EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2) # Hello Codeforces Once Again <img alt="" src="https://codeforces.me/predownloaded/4e/71/4e713a365fc86888c808b3b56d6fecfb529973e6.png" style="float:right; height: 154px; padding-left: 35px; padding-right: 73px; padding-top: 41px; padding-bottom: 33px;"/> After months of hard work, [user:cry,2025-07-01], [user:Lilypad,2025-07-01] and I are extremely proud to welcome you to participate in [contest:2124] at [contest_time:2124]. This round is combined for Division 1 and Division 2, and it will be rated for everyone. You will be given $3$ hours to solve $9$ problems. One problem will be split into two subtasks. We would like to thank the following people for making the contest possible: - [user:satyam343,2025-07-01] for outstanding coordination, working tirelessly with us to improve problem quality and donating his own problems to us. I cannot thank him enough. - [user:Error_Yuan,2025-07-01] for proposing some ideas that weren't used in the end. - [user:Benq,2025-07-01...

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Codeforces Round #647 — Thanks, Algo Muse! Hello Codeforces! We have a pleasure to invite you to [Codeforces Round #647 (Div. 1)](https://codeforces.me/contests/1361) and [Codeforces Round #647 (Div. 2)](https://codeforces.me/contests/1362). This round will take place on [contest_time:1361]. In both divisions, you will have **2.5 hours** to solve **6 problems**. Three of them will be shared. The problems for this round were prepared by [user:MicGor,2020-06-02], [user:Grzmot,2020-06-02], [user:Okrut,2020-06-02] and me. We would like to thank everyone who made this round possible: - [user:Nebuchadnezzar,2020-06-02] for the excellent coordination; - [user:Lewin,2020-06-02], [user:ALILILILILI-KHAN,2020-06-02] for invaluable advice and extensive testing; - [user:KrK,2020-06-02], [user:yarek,2020-06-02], [user:-is-this-fft-,2020-06-02], [user:w0nsh,2020-06-02], [user:Marckess,2020-06-02], [user:Ari,2020-06-02], [user:Fortin,2020-06-02], [user:Dup4,2020-06-02], [user:kraborak,2020-06-02], [user:300iq,2020-06-02], ...

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EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2) <a href="https://epic-institute.io/"><img alt="EPIC" src="https://assets.codeforces.com/images/deltix/2_logo.gif" style="float:right; height: 154px; padding-left: 35px; padding-right: 73px; padding-top: 41px; padding-bottom: 33px;"/></a> Hi, Codeforces! We are pleased to invite you to [contest:1987], which will be held on [contest_time:1987]. You will be given **8 problems**, two of which are divided into two subtasks, and you will have **3 hours** to solve them. The round will be rated for **everyone**. At least one of the problems will be interactive, so please read the [guide for interactive problems](https://codeforces.me/blog/entry/45307) if you are not familiar with it. We would like to thank: - [user:errorgorn,2024-06-27] for coordinating the round. - [user:Geothermal,2024-06-27], [user:turmax,2024-06-27], [user:noimi,2024-06-27], [user:SomethingNew,2024-06-27], [user:feecIe6418,2024-06-27], [user:Endagorion,2024-06-27], [user:glebustim,2024-06-27], [user:zelibo...

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Where the author of the contest came up entertaining. Cheating cheaters. Hello, Codeforces! A month ago I have wrote [my blog about cheaters](https://codeforces.me/blog/entry/94300). Under that blog, a number of suggestions have accumulated, and there is a number of interesting ideas that could be applied to sabotage a group of cheaters. I've often seen comments along the lines of: <spoiler summary="Pictures">. <a href="https://imgbb.com/"><img src="https://i.ibb.co/r65zfTL/cheat1.png" alt="pic1" border="0"></a> <a href="https://imgbb.com/"><img src="https://i.ibb.co/Yh6ZfY8/cheat2.png" alt="pic2" border="0"></a> </spoiler> Well, doing what [user:Ari,2021-09-28] suggested wasn't really what I wanted to do, but it was worth checking out what would happen if the wrong solutions were sent. I asked some famous user what would happen if I sent the wrong solutions to cheaters. He told me that someone had done this before and that he was quickly debunked. I wondered whether I could cheat cheaters without getting caught. But for this, I had to do so...

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Educational Codeforces Round 107 [Rated for Div. 2] Hello Codeforces! On [contest_time:1511] [contest:1511] will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://codeforces.me/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 problems** and **2 hours** to solve them. The problems were invented and prepared by Roman [user:Roms,2021-04-11] Glazov, Adilbek [user:adedalic,2021-04-11] Dalabaev, Vladimir [user:vovuh,2021-04-11] Petrov, Ivan [us...

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EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) <a href="https://epic-institute.io/"><img alt="EPIC" src="https://assets.codeforces.com/images/deltix/2_logo.gif" style="float:right; height: 154px; padding-left: 35px; padding-right: 73px; padding-top: 41px; padding-bottom: 33px;"/></a> Hi, Codeforces! We are pleased to invite you to [contest:2002], which will be held on [contest_time:2002]. The problems are prepared by [user:Flamire,2024-08-06], [user:le0n,2024-08-06] and [user:xcyle,2024-08-06]. You will be given **8 problems** and **3 hours** to solve them. Two problems are divided into two subtasks. The round will be rated for **everyone**. We would like to thank everyone who has helped prepare for this round: - [user:TheScrasse,2024-08-06] for his brilliant coordination. - [user:AdunAdunov,2024-08-08] and [user:Alexdat2000,2024-08-08] for Russian translation. - [user:orzdevinwang,2024-08-06], [user:arvindf232,2024-08-08], [user:MagicalFlower,2024-08-06], [user:rui_er,2024-08-06], [user:LipArcanjo,2024-08-06], [u...

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Educational Codeforces Round 150 [Rated for Div. 2] Hello Codeforces! On [contest_time:1841] [contest:1841] will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://mirror.codeforces.com/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 problems** and **2 hours** to solve them. The problems were invented and prepared by Adilbek [user:adedalic,2023-06-11] Dalabaev, Ivan [user:BledDest,2023-06-11] Androsov, Maksim [user:Neon,2023-06-11] Mesche...

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Educational Codeforces Round 175 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 200px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Neapolis University Pafos](https://www.nup.ac.cy/). On [contest_time:2070] [contest:2070] will start. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 problems** and **2 hours** to solve them. The problems were invented and prepared by Adilbek [user:adedalic,2025-02-26] Dalabaev, Ivan [user:BledDest,2025-02-26] Androsov, Maksim [user:Neon,2025-02-26] Mescheryakov and...

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Educational Codeforces Round 176 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 200px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Neapolis University Pafos](https://www.nup.ac.cy/). On [contest_time:2075] [contest:2075] will start. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 problems** and **2 hours** to solve them. The problems were invented and prepared by Adilbek [user:adedalic,2025-03-16] Dalabaev, Ivan [user:BledDest,2025-03-16] Androsov, Maksim [user:Neon,2025-03-16] Mescheryakov, Al...

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Educational Codeforces Round 190 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 200px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Computer Science and Artificial Intelligence (CSAI)] (https://lp.jetbrains.com/academy/csai-program/) program at [Neapolis University Pafos](https://www.nup.ac.cy/), with scholarships provided by JetBrains. [contest:2230] will start on [contest_time:2230]. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. **The problems in this round will partially intersect with Saratov SU internal contest (schedul...

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Educational Codeforces Round 177 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 150px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Neapolis University Pafos](https://www.nup.ac.cy/bsc-in-computer-science-and-artificial-intelligence). On [contest_time:2086] [contest:2086] will start. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 problems** and **2 hours** to solve them. The round is based on the problems from the Open Championship of Karelia in competitive programming. The problems were invente...

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Educational Codeforces Round 112 [Rated for Div. 2] Hello Codeforces! On [contest_time:1555] [contest:1555] will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://codeforces.me/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 problems** and **2 hours** to solve them. The problems were invented and prepared by Adilbek [user:adedalic,2021-07-29] Dalabaev, Vladimir [user:vovuh,2021-07-29] Petrov, Ivan [user:BledDest,2021-07-29] Androsov, Mak...

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Codeforces Round #765. One of the contest authors is entertaining again. Hello, Codeforces! Codeforces #765 (Div. 2) took place not so long ago, and one of its authors was me. When an hour had passed since the contest started, I decided to remember the old days and start making fun of the cheaters. To that end, I decided to take a look at the old cheater groups and see how they were doing. The first group I looked into &mdash; is the group where the admin is actively fighting against cheaters. So, there really weren't any cheaters on the round. I think that's a success. The second group I checked out &mdash; it's a group with 2.5k users. I decided that just going in there would be too boring, so I decided to write there that I was a contest author. Here's the reaction of the users: <spoiler summary="Picture"> <a href="https://imgbb.com/"><img src="https://i.ibb.co/0Xt07qt/Screenshot-20220112-164100.png" alt="pic1" border="0"></a> </spoiler> Can you imagine?! I write that I am the author of the contest, and I am offered to leak the solution ...

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Educational Codeforces Round 188 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 200px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Computer Science and Artificial Intelligence (CSAI)] (https://lp.jetbrains.com/academy/csai-program/) program at [Neapolis University Pafos](https://www.nup.ac.cy/), with scholarships provided by JetBrains. [contest:2204] will start on [contest_time:2204]. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6-7 problems** and **2 hours** to solve them. The problems were invent...

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Educational Codeforces Round 69 [Rated for Div. 2] Hello Codeforces! On [contest_time:1197] [contest:1197] will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://codeforces.me/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 problems** and **2 hours** to solve them. The problems were invented and prepared by Roman [user:Roms,2019-07-13] Glazov, Adilbek [user:adedalic,2019-07-13] Dalabaev, Vladimir [user:Vovuh,2019-07-13] Petrov, Ivan [user:Bl...

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As an CNOI Gold Medalist: How I Train CNOI Gold Medal Winning Competitive Programmers UPD: [Curated Problem Set #1](Thhttps://codeforces.me/blog/entry/156427) is released. Please join our Discord server to receive the latest updates: https://discord.gg/DsHSfmVgG UPD: Curated problem set #1 (both normal and advanced) **for subscribers** is ready! Feel free to join our Discord server and subscribe! This post is about: 1. The Main Two Abilities You Need in Competitive Programming 2. How to Choose Problems of an Appropriate Difficulty 3. How Should You Work on a Problem 4. When You Should Learn New Knowledge (Like New Algorithms) 5. How to Train Before an Important Contest 6. Free Content, Personalized Subscription Services, and Potential Opportunity for One-to-One Coaching 7. Survey About the Services I won a gold medal at NOI 2024 in my second year of high school and was admitted to the Turing Class at Peking University. After securing my admission, I continued pursuing competitive programming: I began studying new material at university in advance whi...

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Educational Codeforces Round 66 [Rated for Div. 2] Hello Codeforces! On [contest_time:1175] [contest:1175] will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://codeforces.me/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **7 problems** and **2 hours** to solve them. The problems were invented and prepared by Roman [user:Roms,2019-06-04] Glazov, Adilbek [user:adedalic,2019-06-04] Dalabaev, Vladimir [user:Vovuh,2019-06-04] Petrov, Ivan [user:Bl...

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Educational Codeforces Round 50 [Rated for Div. 2] On [contest_time:1036] Educational Codeforces Round 50 will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://codeforces.me/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extented ACM ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **7 problems** and **2 hours** to solve them. The problems were invented and prepared by Vladimir [user:Vovuh,2018-09-06] Petrov, Roman [user:Ajosteen,2018-09-06] Glazov, Ivan [user:BledDest,2018-09-06] Androsov, Maxim [user...

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Olympiad System in Your Country We are conducting a comparative study on the structure, governance, and impact of student Olympiad systems in various countries. Our aim is to gather open and comparable information about participation rules, student age and grade levels, selection processes, and the privileges granted to Olympiad medalists. Please provide answers for your country based on your knowledge — even partial information is valuable and appreciated. [cut] <br> Similar blogs, but outdated: [1](https://codeforces.me/blog/entry/13820), [2](https://codeforces.me/blog/entry/44575). ________________________________________ #### A. General Information 1. Country name: 2. Organizational structure: Is the Olympiad system in your country managed by the government, a private organization, or a hybrid structure (government and private collaboration)? ________________________________________ #### B. Participation Framework 3. Minimum grade (or educational level) eligible to participa...

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A Highly Experimental Training Plan for Beginners Very loosely inspired by some comments on [Thoughts on Reaching Cyan?](https://codeforces.me/blog/entry/101561) and [my recent AMA](https://codeforces.me/blog/entry/118845). Until now, I've avoided telling beginners to practice math before working on competitive programing problems because I haven't figured out a helpful way of doing so. This post is my attempt at telling grays to train math first in a way that might lead to improvement without an absurd time commitment. ## Introduction This section is largely motivation for why I'm proposing this training plan. If you just want to see the instructions for the training plan I'm proposing, you can skip this part. The first subsection in particular is not especially relevant to the rest of the post, but I wanted to have some documentation explaining why I still think the traditional "just solve problems" advice is good. ### The Conventional Advice on Improvement I'm frequently asked for advice on how to improve at co...

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How might LGMs cheat using current AI. Or, are these not cheating? Disclaimer: My natural English ability is questionable. I have passed the blog through chatgpt to correct grammatical mistakes. I experimented with o1-mini and tried to understand its implications for competitive programming on Codeforces at level 2500 or higher. Obviously, the current AI cannot outright provide you with solutions; however, there are already ways it can help quite a lot. ### Brute Force Writing I believe most competitors regularly use brute-forces. They are kind of an admission of failure to find your mistakes on your own. Previously, brute-forces came with the cost of taking 5 minutes to write. I would not do it unless it is a very hard problem, or I have tried debugging by hand for 10 minutes and seen nothing. If AI usage is assumed, then these 5 minutes would be completely saved. Five minutes would correspond to approximately a 10 performance rating if on the final problem and increasingly more on earlier problems. ### Translations of Languages Thi...

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Call for Problemsetters: Osijek Competitive Programming Camp, Summer 2023 Hi everyone! <center><img src="https://ocpc.mathos.unios.hr/images/ocpc.svg" height="80px"></center> After a successful [camp in February](https://codeforces.me/blog/entry/113438), we are excited to announce that Osijek camp will be returning this **September**. Precise dates and registration details will be announced later, but for now, we are looking for contests and problemsetters. To apply, contact us at **ocpc (at) mathos (dot) hr** or contact me ([user:-is-this-fft-,2023-05-29]) or [user:adamant,2023-05-29] directly. Specific compensation might depend on how successful we are with sponsors and participation fees. As a reference point, last time, we offered **2000€** per contest. Note that the compensation is subject to Croatian income tax (around 25%). You don't need to have enough ideas for a full problemset yet, but you should have a somewhat good idea of what your contest is going to be, i.e. you should have at least 6-7 problem ideas already. The most important ...

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Educational Codeforces Round 78 [Rated for Div. 2] Hello Codeforces! On [contest_time:1278] [contest:1278] will start. Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://codeforces.me/blog/entry/51208">blog post</a>. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 problems** and **2 hours** to solve them. The problems were invented and prepared by Roman [user:Roms,2019-12-18] Glazov, Adilbek [user:adedalic,2019-12-18] Dalabaev, Vladimir [user:Vovuh,2019-12-18] Petrov, Ivan [user:Bl...

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Call for Problemsetters: Osijek Competitive Programming Camp, Summer 2024 Hi all. <center><img src="https://ocpc.mathos.unios.hr/images/ocpc.svg" height="80px"></center> Osijek camp will be returning again in the summer of 2024. We are looking for problemsetters. To apply, contact us at **ocpc (at) mathos (dot) hr** or contact me ([user:-is-this-fft-,2024-03-22]) or [user:adamant,2024-03-22] directly. Specific compensation might depend on how successful we are with sponsors and participation fees. As a reference point, last time, we offered **2000€** per contest, plus an additional bonus for authors who conducted analysis sessions onsite for their own contests. Note that the compensation might be subject to some taxation. You don't need to have enough ideas for a full problemset yet, but you should have a somewhat good idea of what your contest is going to be, i.e. you should have at least 6-7 problem ideas already. The most important criterion for us is whether your contest fits the camp in terms of style and difficulty. The camp is aimed at ...

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Operating Systems Notes If you are struggling with the right track and a 10-min read for Operating systems from beginning to end, you're at the right place. Even I am not sure where to start, but we would figure it and if you are reading this, I have successfully completed these notes or at least am on right track. Let's start our struggle for OS: ### The Track I found many resources to learn, let's just list all: (Galvin Concise PPTs)[https://www.os-book.com/OS9/slide-dir/index.html]: These were great but I felt that these are a little bit too much, so here are the chapters we would do: 1. Processes 2. Threads 3. Process Synchronization 4. CPU Scheduling Algorithms 5. Deadlocks 6. Main memory 7. Virtual memory 8. Virtual Machines > I am skipping the introduction of OS for now as it was not that important, this is going to be a fast article that works like a last night dose. <spoiler summary="A simple introduction(May skip if you are already familiar)"> An Operating system is like a...

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Educational Codeforces Round 191 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 150px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Neapolis University Pafos](https://www.nup.ac.cy/bsc-in-computer-science-and-artificial-intelligence). On [contest_time:2233] [contest:2233] will start. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 or 67 problems** and **2 hours** to solve them. The problems were invented and prepared by Ivan [user:BledDest,2026-04-16] Androsov and me. Also, huge thanks to Mike [...

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Ten Years of Competitive Programming 5 Hey, Codeforces! I’m AmirReza PourAkhavan, the former Codeforces Contest Coordinator. I let the story become complete, and I’m sharing it now. The story is about a 16-year-old competitive programmer who left his family and migrated to another city alone to follow competitive programming. After seven years, he advanced to the International Collegiate Programming Contest World Finals twice. Read the previous parts: [1](https://codeforces.me/blog/entry/107465), [2](https://codeforces.me/blog/entry/108838), [3](https://codeforces.me/blog/entry/114356), [4](https://codeforces.me/blog/entry/122483). **Read the Persian version** [**here**](https://docs.google.com/document/d/1TN8pnS_8te7MLDYzMjlDxFrElNVjE4ZWjo1Ak-JJdmc/edit?tab=t.isfroku1gx3e). This part covers from December 2016 to November 2017. ## The Codeforces Contest Our contest was held on Codeforces, and it broke several records. - The record for the highest number of upvotes on an editorial. - The record f...

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[Invitation] Coding Events — Esya'23 IIIT-Delhi Hello, Codeforces ( ^_^)／ Warm and friendly greetings from **FooBar (Competitive Programming Club)**, [IIIT-Delhi](https://www.iiitd.ac.in/). We have a variety of coding events hosted under our annual technical Fest &mdash; [Esya'23](http://esya.iiitd.edu.in/) and are glad to extend an invitation for your participation.    The details for the events are as follows: - **ProTrio** [[Registration Link](https://unstop.com/p/protrio-esya23-indraprastha-institute-of-information-technology-iiit-delhi-728752)]: - ICPC-style coding contest - Eligibility: College Students | Team Size: 1-3 members (same college) - Stages: preliminary (online) and final round (on-site) - Prizes: worth ₹40,000 - **ProCon Junior** [[Registration Link](https://unstop...

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SIT STAR Contest Dear Codeforces, <center> <img alt="SIT" src="https://codeforces.me/predownloaded/d4/db/d4dbb8246ae4440dc97d3d23025a2af15f58387b.png" style="float:right; height: 300px; margin: 10px; max-width:50%;"/> </center> Today, [Schaffhausen Institute of Technology in Switzerland](https://sit.org/) is opening SIT STAR Contest to promote interest in Computer Science and Software Engineering. The final round is scheduled for February 10, but you can already sign up and practice for the big day. In this contest, you get to solve up to 12 challenges in algorithmic programming in just 4 hours and a chance to study at SIT with a full scholarship! **<font color="red">When?</font>** 1. **February 1-7, 2021 | Practice Round** You can already try the testing environment. Although not obligatory, this step will help you feel more confident during the actual contest. The results of this practice round won’t affect your final score. 1. **February 10, 2021 | SIT STAR Contest** Join the f...

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Новости Факультета Компьютерных Наук ВШЭ В этом году первый набор [Факультета Компьютерных Наук](http://bit.ly/25msmZi) заканчивает третий курс, у них прошел первый год специализаций (предыдущие посты про новости ФКН: [1](http://codeforces.me/blog/entry/45054), [2](http://codeforces.me/blog/entry/18801), [3](http://codeforces.me/blog/entry/17195), [4](http://codeforces.me/blog/entry/12859), [5](http://codeforces.me/blog/entry/11918)). Все студенты 3-го года обучения прошли курс по машинному обучению от [Евгения Соколова](https://www.hse.ru/staff/esokolov) (автора известной [специализации на Coursera](https://goo.gl/1nf8KS) и руководителя отдела машинного обучения сервиса [Яндекс.Дзен](https://goo.gl/Pnzp7S)). Если вы еще учитесь в школе, то вы можете послушать Евгения в [летней школе ФКН](https://goo.gl/0Ztkqf); также он отвечает за преподавание машинного обучения в [августовской параллели A-ML ЛКШ](http://lksh.ru/sis/2017/parallel-a.shtml). Также общим был курс методов оптимизации, состоявший из непрерывной части ...

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Первый год факультета компьютерных наук ВШЭ В прошлом году я [писал](http://codeforces.me/blog/entry/11918) про создание нового факультета компьютерных наук в ВШЭ силами команды Школы анализа данных, [отвечал](http://codeforces.me/blog/entry/12859) на частые вопросы абитуриентов. Кстати, можете [регистрироваться](https://docs.google.com/forms/d/1szjkJKmB34jldx92vIdD21aOAqBardvMw8Z6zWFVgik/viewform?c=0&w=1) и приходить на [день для школьников](http://cs.hse.ru/day_for_schools) 5-го апреля с 12:00, если вам интересно [что-то из этого](http://www.hse.ru/news/admission/146267030.html). Летом я лично общался со многими призерами и победителями олимпиад через ВКонтакте и выяснял их настроение по поводу выбора факультета, причины того или иного выбора. Субъективно, наиболее частыми ответами, который я получал, или просто запомнившимися, были такие (не обязательно в порядке частотности): 1. А я и так уже выбрал ваш факультет. 1. Я бы к вам пошел, но боюсь, что на первом году у вас будет бардак, поэтому все-таки пойду на ВМК/ФИВТ....

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Академический университет: бакалавриат <p style="text-align: justify;"> Я учусь на первом курсе бакалавриата по направлению информатики Санкт-Петербургского <a href="http://spbau.ru/"><b>Академического университета</b></a> Российской академии наук (СПбАУ). Здесь действительно <i>интересно</i> и <i>увлекательно</i> учиться. Я попробую рассказать об обучении в АУ и о том, почему мне нравится здесь. </p> [cut] <h3>Что можно почитать?</h3> <p style="text-align: justify;">Краткую историю университета можно <a href="https://ru.wikipedia.org/wiki/%D0%A1%D0%B0%D0%BD%D0%BA%D1%82-%D0%9F%D0%B5%D1%82%D0%B5%D1%80%D0%B1%D1%83%D1%80%D0%B3%D1%81%D0%BA%D0%B8%D0%B9_%D0%B0%D0%BA%D0%B0%D0%B4%D0%B5%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D1%83%D0%BD%D0%B8%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%82%D0%B5%D1%82_%E2%80%94_%D0%BD%D0%B0%D1%83%D1%87%D0%BD%D0%BE-%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%BE%D0%B2%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9_%D1%86%D0%B5%D0%BD%D1%82%D1%80_%D0%BD%D0%B0%D0%BD%D0%BE%D1%82%D0%B5%D1%85%D0%BD%D0%BE...

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From Newbie to Expert in 6 months Hello there. I would like to share my experience on how I reached Expert in my first 6 months. A few people asked me about that so I am writing a blog for everyone to see and the techniques I used to reach expert in 6 months. I started Competitive Programming 8 months ago. I didn't know except some basics about visual basic programming language and I didn't know except to do some GUI and write basic code. I was introduced to CP and how important it was from university admissions to job interviews. I began to learn step by step new ideas, new algorithms etc... From my experience, I would like to share those important tips from my point of view: - **Always train CP with a target**. This really helps you to train and read articles(like implementation and algorithms and maths) to reach your target as fast as possible - **Train with your friends**. Training with your friends and trying to out perform them. - **Always take rating seriously and compete online in many sites**. Rating ...

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PhD Positions at the Hong Kong University of Science and Technology (HKUST) Hi everyone! The Software Verification and Analysis (SVA) research group at HKUST has several openings for PhD positions in Programming Languages, Formal Verification, and Algorithms with a start date in September 2022. We welcome candidates with a bachelor's or master's degree in either Computer Science or Mathematics. The group's research is mathematical and algorithmic in nature. As such, we prefer candidates who have demonstrated research experience or a track record of excellent performance in competitive programming or mathematical/informatics olympiads. Candidates are expected to speak English fluently. We have openings for PhD in both Theoretical Computer Science and Mathematics. The normal duration of PhD studies is 3 years for MSc entry and 4 years for BSc entry. Salary is internationally competitive (~2300 USD/month, tax rate < 2%) and subsidized on-campus accommodation is provided. Admitted students will also be considered for the Hong Kong PhD Fellowship Scheme (HKPF...

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Harbour.Space University and Remy Robotics: Master's in Robotics programme scholarship <img src="https://assets.codeforces.com/images/artboard-2_1.png" style="float:right; margin: 0 1em 1em 1em; width:450px;"/> My friends from Harbour.Space and Remy Robotics asked to publish the news. I am excited and glad to do it, because for our community this is a true exclusive offer. In short, they offer to study robotics in Barcelona, paying for your studies and even with a scholarship! It's so cool! Here is a direct speech from Harbour.Space. = Hi Codeforces! We are excited to announce our new Master’s in Robotics programme scholarship, which will be paired alongside an internship with our partner Remy Robotics! The programme will begin on January 7th, 2019, at our university in Barcelona, Spain. Harbour.Space’s Robotics programme is the bridge between a personal interest in the world of Robotics, Artificial Intelligence, and a top-level professional future in one of the most exciting and fastest growing fields of technology. Students who enter the programme w...

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EPIC Institute of Technology, 2023-2024 Enrollment Campaign <a href="https://epic-institute.io/"><img alt="EPIC" src="https://assets.codeforces.com/images/deltix/2_logo.gif" style="float:right; height: 154px; padding-left: 35px; padding-right: 73px; padding-top: 41px; padding-bottom: 33px;"/></a> Hello, Codeforces! A year ago we talked about our educational project **EPIC Institute of Technology**. Details can be found [here](https://codeforces.me/blog/entry/102993). Now we are pleased to announce that we are starting the admission campaign for the 2023-2024 academic year! EPIC Institute of Technology is more than just an educational institution; it's a hub of innovative ideas and brilliant minds coming together! Here we make a difference and create a point of rapid growth for talented and driven individuals, leveraging the truly global leadership position of EPAM. EPIC Institute of Technology is committed to establishing and maintaining the highest standards by bringing together bright professionals to share Deltix unique expertis...

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Educational Codeforces Round 189 [Rated for Div. 2] <img alt="Neapolis University Pafos" src="/predownloaded/9a/33/9a332fadbb47050ba9405057df022a6e37eaf5c0.png" style="float:right;height: 150px; margin: 10px; max-width:40%;"/> Hello Codeforces! The series of Educational Rounds continues thanks to the support of the [Neapolis University Pafos](https://www.nup.ac.cy/bsc-in-computer-science-and-artificial-intelligence). On [contest_time:2225] [contest:2225] will start. This round will be **rated for the participants with rating lower than 2100**. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally. You will be given **6 or 7 problems** and **2 hours** to solve them. **This round is based on problems from the 2026 Tula Open Programming Championship.** The problems were invented and prep...

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A Friendly Competitive Programming Discord Server! Hello everyone, For the past few years I’ve spent quite a lot of time helping students with programming for university admissions and competitive programming. Most of the time it wasn’t anything formal. Usually it was just sitting down together, looking at problems, discussing ideas, and trying to understand why a certain approach works or why another one fails. Those kinds of discussions are honestly one of the things I enjoy the most about competitive programming. Because of that, I thought it would be nice to create a place where people who enjoy algorithms and contests can simply talk and exchange ideas more easily. So I started a small [Discord Server](https://discord.gg/x3zrJxvfSP). The idea is simple. A relaxed place where people can discuss problems, share ideas, and talk about contests. For example: - discussing algorithms and different approaches to problems - talking about interesting problems we encounter - discussing Codeforces rounds after they end - hel...

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Продолжается набор в Школу анализа данных Привет, Codeforces!!! До 19:00 10 мая открыт [набор](https://yandexdataschool.ru/admission/) в Школу анализа данных Яндекса. За два года учёбы в ШАДе перед вами раскроется множество направлений современных компьютерных наук. Вы познакомитесь (или улучшите уже имеющиеся знания) с продвинутыми алгоритмами и структурами данных и с методами машинного обучения, научитесь делать выводы из данных и находить приближённые решения NP-трудных задач, узнаете, как работает автоматический переводчик и как научить бота разговаривать, разберётесь в устройстве систем, обрабатывающих огромные потоки данных в режиме реального времени, и беспилотного автомобиля. Будет сложно, но вам понравится! Набор традиционно проходит в три этапа: онлайн-тест, письменный экзамен и очное собеседование. Вы можете поступить как в ШАД в Москве (очное обучение), так и в один из филиалов (в Минске, Екатеринбурге и Нижнем Новгороде, очно-заочное обучение) или на заочное отделение. В этом году в Школе принимают уча...

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A scholarship for programming contestants — Jagiellonian University in Kraków, Poland Hello, This is a post for high school students who are considering their university options: [Jagiellonian University in Kraków](https://en.uj.edu.pl/en) has a [scholarship](https://matinf.uj.edu.pl/en_GB/kandydaci/oferta-dla-najlepszych/stypendium-mertensa/informacje) for talented students who want to study with us, aimed specifically at programming and/or mathematical contest medalists (this includes IOI, of course, but also your national competitions). We are one of the oldest (over 600 years!) European universities, with strong mathematical traditions. As for more modern times, we are regular ICPC World Finals qualifiers (with some [medals](https://icpc.global/community/results-2006) on our [record](https://icpc.global/community/results-2011), [too](https://icpc.global/community/results-2013)), and we tend to create [nice programming contests](https://codeforces.me/gym/100543) (also, [here](https://amppz.tcs.uj.edu.pl/2019/data/amppz-en.pdf) and [here](https://codeforces.com...

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MPhil in Financial Technology (Blockchain) at the Hong Kong University of Science and Technology Hello Codeforces! We have several openings for fully-funded Master of Philosophy (MPhil) positions in Financial Technology at the Hong Kong University of Science and Technology, _Guangzhou Campus_. We welcome candidates with a bachelor's degree in computing, mathematics or any other related STEM field. This is a research-focused master's program in which the students will devote the vast majority of their time to research and only a small portion to passing graduate courses. The research itself will be focused on algorithmic and formal aspects of Blockchains and Cryptocurrencies, including game-theoretic security analysis. Therefore, we prefer candidates who have demonstrated research experience or a track record of excellent performance in competitive programming or mathematical/informatics olympiads. The working language of HKUST is English. The normal duration of an MPhil is 2 years. Successful candidates will become members of our Software Verification and Analysis (SVA) res...

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Harbour.Space Scholarship Contest 2021-2022 (Div. 1 + Div. 2) <img alt="Codeforces and Harbour.Space" src="https://codeforces.me/predownloaded/d7/d0/d7d08f55e940d3b13f74ba80b556ce95b5cc1837.png" style="float:right;height: 150px; margin: 10px; max-width:50%;"/> Hey, Codeforces! We have great news for you. Harbour.Space University is excited to announce **a new contest for all interested programmers** who want to start their studies in Barcelona, Spain or Bangkok, Thailand, and join our ICPC team. The contest will be hosted on the Codeforces platform [contest_time:1553]. We have prepared 9 problems of the joined (Div1 + Div2) level. The round will be **rated and open for everyone.** UPD: Scoring distribution: 250-500-750-1250-1750-2500-3000-3750-5250 UPD2: The [editorial](https://codeforces.me/blog/entry/93105) is out! <center style="margin:2.5em;"> <a href="https://codeforces.me/contests/1553" style="text-decoration:none; font-size:16px; background-color:#685dc5; color:white; font-weight:bold; padding:0.5em 1em;">Sign up ...

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The inevitable despair of a fallen man, a truly demotivating rezil story Hello CodeForces, tonight we mourn the sad demise of a man who once was a legend, truly an icon in the Turkish CP community. That man is [user:AhmetKaan,2025-09-21] Avcı. Let me tell you the sad, disgusting story of how he became who he is and what has yet to happen to him. Our story begins in 2004, just two days ago in September 19th. Born in Kastamonu/Türkiye to a family of 6 children, a family that posseses one IMO participant (Ömer Avcı), and one older brother who once dominated Turkish Olympiad programming. ([user:farukkastamonuda,2025-09-21] orz) This man was obviously blessed with inspiration from an abundance of role models inside his own home. Even though genetics seemed to be to his advantage, he always lacked the skill to even do simple math. He cried his nights yearning to become like his elite brothers. It just didn't come natural to him, ever. His prayers were answered and his older brother Faruk came back home from his highschool outside Konya, and trained him al...

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MathMash — Round 26 Hello Codeforces! I'm glad to announce that we will be having [**Round $26$**](https://www.mathmash.org/contest.php?id=26) of [**MathMash**](https://www.mathmash.org/) today at [**$17:00$ UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?msg=MathMash%20-%20Round%2026&day=27&month=07&year=2018&hour=17&min=00&sec=00). The round has been prepared by [**Snpushpita**](https://www.mathmash.org/profile.php?user=Snpushpita) and [user:DrSwad,2018-07-26]. The round will consist of $8$ problems, to be solved within $2$ hours. Points distribution for the problems are decided as `500-750-1000-1500-2000-2500-3000-3500` We're inviting you all to join us in the contest. Hopefully we'll have a fun and successful round. <hr> **PS: We're redesigning and implementing a bunch of new features to MathMash. But none of my friends are much good at Illustration. So we would be really grateful to anyone with Illustration skills who would kindly be willing to collaborate with us. All ...

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How are Solutions Executed in an OJ? Hello Codeforces! It's been long since I last had the fun of any serious programming(being all night awake with loud music on headphones and lots of snacks infront) due to admission studies. I'm missing it a lot. So after the exams are done I wish to improve MathMash a lot and also start a pet project of some sort. First thing that came to my mind is to build a small cute OJ. I'm aware that we have plenty of OJs already and they are more than enough helpful. So this project won't be of much use to anyone. But it'll be fun to design and build an entire OJ from scratch and also learn lots of new stuff along the way. So I did a light research yesterday about what I might need to learn to build it. The first obvious thing needed is of course a way to execute submitted codes. I tried to go with the easiest option first: Using some third-party service/api so that I can give them the code and receive the output. But there doesn't seem to be any free option of this kind. Ideone used to p...

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Innopolis Open — Olympiad in Informatics for secondary school students: Registration is open until December 15, 2016 <img src="http://codeforces.me/predownloaded/40/c0/40c02b70e56b441229f7de21c6455d0d8dc96f80.png" style="float: right; margin: 0 1em 1em 1em;"> [University Innopolis](https://university.innopolis.ru/en/) is organizing and holding [Innopolis Open](https://olymp.innopolis.ru/en/ooui/16-17/), an Olympiad in Informatics for secondary school students (until 19 y.o.). The Olympiad consists of two rounds &mdash; online contest and the on-site competition (held at [Innopolis](http://innopolis.com/en/), Russia). Winners of the first round will be invited to Innopolis to take part in the on-site competition. During the Olympiad, all participants will be offered a free of charge accommodation, meals and transfer from Kazan to Innopolis and back. Winners of the second (on-site) round will receive awards and can be enrolled in Innopolis University without any admission tests. - The first (online contest) round will start on [December 18 at 10.00 a.m. (UTC +3)](http://www.timeanddate.c...

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My sincere apologies To all law authorities, this is an admission of guilt. Today I competed in [**Codeforces Round 870 (Div. 2)**](https://codeforces.me/contest/1826) and I made the unethical move of copying the solution of problem **B** from some telegram channel. I was foolish to do such a dick move and would like to publicly apologise for my actions. I would request to be disqualified ( or receive a negative rating change ) because I definitely don't deserve my +11 delta. There are lots of people who worked hard in this contest, but still got a negative rating change. Cordially, _tibinyte_

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Recruiting Teammates for NUS in 2021(Attending a Ph.D Program) Hi~Codeforces! I have participated in ICPC for 4 years and finally got the chance advancing to World Finals 2020 by winning 3rd(school ranking) place in this year’s East-Continent Finals(EC-FINAL). I am also the 2nd in Shenyang Regional 2018, 3rd(school ranking) in Nanjing Regional 2019. I will go to National University of Singapore pursuing a Ph.D in this year. With the support of my mentor Andrew Lim, I would like to provide this invitation: are there CF users with ratings 2300 or higher, are ICPC eligible for WF 2021, and would be interested in attending a Ph.D Program at NUS starting from Autumn 2020? Both my mentor and I would like to put up a competitive team fighting for World Finals Medals in 2021 and we will try our best to support this plan. If you are interested, please e-mail me at [email protected] with your CF id, and ideally, a short CV. We will arrange an interview for you as soon as possible. If things go well, the offer will reach you at the end of May. ...

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Topcoder Dynamic Programming Webinar and Practice Contest Hi All, <a href="https://www.topcoder.com/members/misof"><font color=red><b>misof</b></font></a> is hosting a webinar on Dynamic Programmin today. [Register for the webinar now](https://us02web.zoom.us/webinar/register/WN_fSrwaNjuR3S0mpbcYjVTPw). The webinar has an admission limit, thus we will also be streaming live on Youtube too: https://www.youtube.com/channel/UCFv29ANLT2FQmtvS9DRixNA The webinar will be followed by a <font color=red><b>practice contest</b></font> to allow you to flex your nerves. Read [this tutorial](https://www.topcoder.com/thrive/articles/Dynamic%20Programming:%20From%20Novice%20to%20Advanced) and get ready. The contest will consist of 10 Topcoder Problems which featured in past contests and will be open for 23 hours. You can submit whenever you feel like during the time frame. Registration is now open for the Practice Contest in the [Arena](https://arena.topcoder.com) or [Applet](http://www.topcoder.com/contest/arena/ContestAppletProd.jnlp...

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Innopolis Open: an Olympiad in Informatics for high school students under 19 years old <img src="/predownloaded/d7/23/d723c787c2d1efe79ae42612992581c929784dc1.jpg" style="margin: 0 0 0 1em; float: right;"> [Innopolis University](https://university.innopolis.ru/en/) is organizing and holding [Innopolis Open](http://2018.olymp.innopolis.ru/en/), an Olympiad in Informatics for high school students under 19 years old. The Olympiad consists of two stages — the online contest and the on-site competition (held in [Innopolis](http://innopolis.com/en/), Russia). Winners of the first stage will be invited to Innopolis to take part in the on-site competition. Accommodation, meals and transfer from Kazan to Innopolis are covered by the organizing committee. Winners of the second (on-site) stage will receive awards and opportunity to be enrolled in Innopolis University without any admission tests. The first stage (online contest) will be held on: - December 2, 15:00 (UTC +3) - December 17, 10:00 (UTC +3) You may participate on both dates; the organizing committee ...

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Innopolis Open: the Olympiad in Informatics for high school students under 19 years old [Innopolis University](https://university.innopolis.ru/en/) is organizing and holding Innopolis Open, an Olympiad in Informatics for high school students under 19 years old. Innopolis University has organized three Olympiads this year: - [eJOI2018](http://ejoi2018.org/) ([watch the video](https://www.youtube.com/watch?v=cfDtw3YraUs)) - [Innopolis Open 2018](https://olymp.innopolis.ru/en/ooui/information/) - [APIO 2018](https://apio2018.ru/) And we glad to invite every high school student to participate in [Innopolis Open 2019](https://olymp.innopolis.ru/en/ooui/information/). The Olympiad consists of two stages — the online contest and the on-site competition (held in [Innopolis](http://innopolis.ru/en/), Russia). The winners of the first stage will be invited to Innopolis to take part in the on-site competition. The accommodation, meals and transfer from Kazan to Innopolis are covered by the organizing committee. The winners of the second (on-site) stage will receive aw...

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[OI in China] Announcement on Age Requirements for Participation in CSP-J/S Certification **This article relies on DeepSeek-R1 for translation.** Or you can see the original text on [this site](https://www.noi.cn/xw/2025-02-13/837984.shtml). ----- Studying computer science is beneficial for cultivating logical thinking and problem-solving skills in adolescents. However, this requires a foundational knowledge base and cognitive abilities, and earlier participation is not necessarily better. In recent years, there has been a trend of increasingly younger elementary school students participating in the CCF Non-Professional Software Competency Certification (CSP-J/S). Premature participation in CSP-J/S by elementary school students negatively impacts their physical and mental health and regular academic development, which also contradicts the original purpose of CCF's certification program. Additionally, some middle schools have begun using elementary students’ CSP-J/S results as a reference for admissions, leading to significant utilitarian tendencies that disrupt nor...

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Ph.D. Position in Algorithms and Machine Learning at Indiana University  Hi all, Multiple Ph.D. positions in Algorithms and Machine Learning are available at Indiana University, Bloomington starting August 2018. Check out this link for the details of the call: http://grigory.us/phd-call.html Application deadline: Dec 1, 2017. Details on the application process can be found here: http://www.soic.indiana.edu/graduate/admissions/how-to-apply/computer-science.html We welcome applications from students with strong olympiad background (IMO, IOI, ACM ICPC, TopCoder, Codeforces, etc.). Our group includes some former olympiad competitors like myself (Top-24 in TCO'10) and Yuan Zhou (IOI 1st place, '05; ACM ICPC 2nd place '09). Starting this year we have two Codeforces members joining our program: [user:dyukha,2017-08-19] and [user:nk.karpov,2017-08-19]. Please, feel free to contact me directly or ask any questions here if you are interested. -- Grigory Yaroslavtsev / Григорий Ярославцев e-mail: grigory.ya...

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Олимпиадное программирование и выбор вуза Disclaimer: я понимаю, что codeforces не самое лучшее место для такого поста. Что всем более интересны соревнования и прикольные задачки. Просто мне интересно мнение именно сообщества Codeforces по этому поводу. я понимаю, что таким спорным постом солью вклад, поэтому пишу с левого аккаунта. Я понимаю, что таким образом в некотором смысле проявляю неуважение к сообществу, поэтому заранее прошу у вас прощения. ***Осторожно! многабукаф*** Стало интересно: почему там много крутых олимпиадных программистов выбирают не самые топовые вузы для дальнейшего образования? Почему так мало олимпиадников идёт куда нибудь в MIT, Stanford, Harvard и в другие подобные места? Если сопоставить места, где учаться спортивные программисты и фавориты рейтингов 1) https://www.topuniversities.com/university-rankings/university-subject-rankings/2018/computer-science-information-systems QS University Ranking (Computer Science) 2) https://www.timeshighereducation.com/world-university-rankings...

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why do you do competitive programming ? <p> Why do you do competitive programming? </p> <p> I know most of you does it for fun, but when it comes to practicing 5+ hours a day, I don’t think it should be just for fun (or you’d be wasting your time). </p> <p> What do you think competitive programming would do for you? Get you to a college? A dream job? </p> <p> One month ago (and until now) I’m practicing for minimum 3 hours a day, and this really affected my school grades. I don’t have much time for studying anymore. However I’m doing it to improve my skills in order to be able to achieve a medal in the IOI, which would boost my admission to one of the top colleges. </p> <p> I was wondering what do you think, and why do you do it? </p>

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Should I Focus on Projects or Aim for a CCO Medal? Lately, I’ve been asking myself a big question: what’s the best path to stand out for admission into top universities in Canada and the U.S.? Should I invest my time into creating a few meaningful projects, or should I give my absolute best to earn a medal at the Canadian Computing Olympiad (CCO)? Option 1: Build 3 Projects Here are the three projects I’m considering: 1. Competitive Programming Tracker – A web app that tracks coding contest progress, offering analytics and recommendations for improvement. 2. QuantSim – A simulation tool for basic trading strategies, designed for students curious about quantitative finance. 3. Euclid Puzzle Generator – A platform that generates math competition–style problems with step-by-step solutions. Option 2: Aim for a CCO Medal On the other hand, winning a medal at the CCO is one of the strongest signals of programming ability in Canada. It’s highly respected by top universities like Waterloo, MIT, and U of T. A medal could demon...

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GlobeX Cup'19 Online Programming Competition Hello Codeforcers! We're excited to invite you to participate in GlobeX Cup’19. GlobeX Cup is the world’s leading student-run online programming competition for youth. The event takes place during December 6-8 for a 48-hour window. Once you enter the contest, you will have 3 hours to solve the designated problem statements. The contest contains two divisions of increasing difficulty, with more than $1000 in prizes awarded to top competitors in each division. #### Contest GlobeX Cup’19 includes the junior and senior division, featuring problem difficulties from Division 3 to Division 2. To determine which division suits you the best, try the [past problem statements](https://globexcup.com/past-contest/) from last year’s contest. #### Registration 1. Register for an account on [DMOJ](http://dmoj.ca) (contest’s online judge) 2. Fill out this [registration form](https://tinyurl.com/uawo9b2) in order to be eligible for prizes 3. You are all set! #### Prizes 1st Place: $70 C...

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Few words about NOIP We have NOIP = National Olympiad in Informatics Plus rather than National Olympiad in Informatics in Provinces. More pricisely, we have one more task but an half hour less to compete. Sincere CCF(China Computer Federation) thought we competitors were too weak to gain the admission to NOI, so they threw a harder version to us, and ensured that we would never have the chance to participate the Province Selection, which is set to sellect the NOI participants.

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A question for Indian competitive programmers Hi Codeforces, I am curious about some matters that I think our fellow CPers from India (or those who know the CP scene in India well) can help explain to me. I think these topics can be a bit sensitive to talk about, which is why I made a throwaway. **1. What is the typical motivation for someone to start doing competitive programming in India?** In many parts of the world, competitive programming comes with practically no prestige or career advantages; at least in the US, I'd estimate less than 10% of tech company recruiters or computer science majors know what Codeforces even is, and probably less than 1% knows whether a CF rating of 3000 is considered good or not. Being good at competitive programming certainly helps for interviews, but putting "I am Div 1 on CF" on your resume will impress practically no one. Admittedly, excellent (IOI or close) level performance helps for college admissions, but if you're not at that level it really doesn't help, and there are many other wa...

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HELP ME IN THIS PROBLEM problem statement : given n students and m colleges each student has a list of preferred colleges in which they want to take admission. each college has a certain capacity to take students assuming any college will accept any student find a mapping such that max number of students can get admission and return max number of seats that can be occupied. note: constraints were not given and students will take admission if they get a seat in their preferred college

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Warning about people faking WZYYN's identity Recently, there are people using [user:WZYYN,2023-04-07](Zhou Yuyang)'s identity to chat on the Internet and teach other people. If an account like [user:WZYYN,2023-04-07] and talk with you, please notice if he is true or someone's alt, or email [email protected]. <spoiler summary="Original message from WZYYN Chinese"> 本人在最近一年多次从好友，同学处得知，有不法人士使用本人的获奖履历，进行线下学习方法指导、信息竞赛培训，线上交友等活动。 其在交流中常常使用“清华大学交叉信息学院周雨扬”、“北京大学周雨扬”、“清华大学招生办周雨扬”等身份，利用伪造的“周雨扬”世界观，博取对方信任后，传播不实信息，损害本人名誉，并可能进行诈骗活动。 其这种行为严重侵犯了本人的姓名权。由于其未停止对本人名誉权的侵犯，我已于近日向警方报案处理此事，并保留后续进行民事诉讼的权利。 若之后有自称周雨扬的人尝试与您进行交流，除非确认我本人认识你且有我本人的联系方式，否则请通过邮箱 [email protected] 再次核验。 若在与自称周雨扬的人交流过程中涉及诈骗，亦或者是受到钱财损失，请及时与本人联系，或者及时向警方报案处理。 周雨扬 2023.4.7 </spoiler> <spoiler summary="English by Google Translator"> I have learned from my friends and classmates many times in the past year that illegal people use my award-winning resume to guide offline learning methods, information competition training, and make friend...

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Ph.D. Position in Algorithms and Machine Learning at Indiana University  Hi all, Multiple Ph.D. positions are available at the Center for Algorithms and Machine Learning at Indiana University, Bloomington. Starting date: August 2019. Check out this link for the details of the call: http://grigory.us/phd-call-f18.html Application deadline: Dec 15, 2018 (upd: deadline changed). Details on the application process can be found here: http://www.soic.indiana.edu/graduate/admissions/how-to-apply/computer-science.html We welcome applications from students with strong olympiad background (IMO, IOI, ACM ICPC, TopCoder, Codeforces, Kaggle, etc.). Our group includes some former olympiad competitors like myself (Top-24 in TCO'10) and Yuan Zhou (IOI 1st place, '05; ACM ICPC 2nd place '09). Please, feel free to contact me directly or ask any questions here if you are interested. -- Grigory Yaroslavtsev / Григорий Ярославцев e-mail: [email protected]

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Ph.D. Position in Algorithms and Machine Learning at Indiana University Hi all, Multiple Ph.D. positions in Algorithms and Machine Learning are available at Indiana University, Bloomington starting August 2017. Formal call is below (**UPD**: Application deadline is Dec 1, 2016: http://www.soic.indiana.edu/graduate/admissions/how-to-apply/computer-science.html). HTML: http://grigory.us/phd-call.html PDF poster: http://grigory.us/phd-call.pdf We welcome applications from students with strong olympiad background (IMO, IOI, ACM ICPC, TopCoder, Codeforces, etc.). Our group includes some former olympiad competitors like myself (Top-24 in TCO'10) and Yuan Zhou (IOI 1st place, '05; ACM ICPC 2nd place '09). Please, feel free to contact me directly or ask any questions here if you are interested. -- Grigory Yaroslavtsev e-mail: [email protected] http://grigory.us

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Ambarsariya = Karangreat 2.0 One day [user:ambarsariya,2021-05-25] ask me also for solution during a contest. i said no i will not cheat. he used bad words. He is buying solution with money. He got admission in LPU also with money. His parent should be ashamed for him. People like this spoiling the reputation of India. he is Desh drohi. He is shame to India. One day sure codeforces rating will become like codechef rating because of people like him. Candidate Master will be joke. people doing working hard for candidate master there hard work will be wasted. He is spoiling and dilutioning codeforces. He should be banned for sake of codeforces. he is karangreat verson 2.0 <spoiler summary="codejam round 1b cheating proof - his submsiion"> ~~~~~ bool done = false; void go(ll a, ll b, ll c) { ll tm = ((why * (b - a)) % mod + mod) % mod; ll chk = tm * 708; if((b - c + chk) % mod == 0) { ll nano = tm % (ll)1e9; tm /= 1e9; ll sec = tm % 60; tm /= 6...

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For those looking to study abroad TOP CAREER Virtual Study Abroad Fair -2013 Spring-” From Jan.23-Mar.31! http://vf.topcareer.jp/?referrer=2712 Register and Participate from the URL above and win a great prize such as flight tickets to/from Japan, hotel coupons, online shopping cards, etc.! You can also win an opportunity of internship offer from Fourth Valley Concierge Corporation, after you pass the screening process. *Prize winners are chosen randomly from registered participants. Participate in an online fair where you can find information about scholarship, admission, and etc.), virtually visit schools all around the world, and directly chat with schools’ representatives without actually flying all the way. Join anytime (24hrs/day!), anywhere! [Fair Information] Name: TOP CAREER Virtual Study Abroad Fair -2013 spring- Date: January 23, 2013 (Wed) – March 31, 2013 (Fri)

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ACPC Story 8# "Forced to pay 2000$, or even more, idk, for attending (since they're hosting it in a luxurious hotel), and only to have the ability to write the title of "region finalist" in my admissions as proof of my skills. And due to these financial constraints, 7 days left, and I'm still not qualified." Submitted 05/12/2025, 14:45 check this [blog](https://codeforces.me/blog/entry/148799) if you want to know more or share your story!

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Harsh Truth of diversity hiring and difficulties faced by mens. Actually I want to talk about diversity hiring or inclusive hiring that is happening in most of the engineering colleges. We literally receive tons of emails about only-women hiring, only for female candidates, girls who code and bla bla bla. So I read about it, and found that it was introduced to help so called "weaker-sections of society" so that they can get equal opportunities in STEM fields. In India, this "weaker-sections" mainly includes mostly women only (in USA also includes black people). See, i appreciate the thinking that there should be equal opportunities for men and women and other genders as well. But, what is disheartening is that, in order to achieve so called "equality" these companies and corporates have now become biased for female candidates. There are separate hiring drives only for women, separate training and internship programs especially focussed on women, there are these coding competitions all these are held by big companies like Twitter, Google, Uber et...

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ACM TIMUS 1673 (Admission to Exam) Problem link : http://acm.timus.ru/problem.aspx?space=1&num=1673 I know i need to calculate the inverse Phi function or i can also precompute the Euler's Totient function and proceed from there but the problem is, with such a large constraint, both don't seem to be working for me. It would be great if someone could point me in the right direction, because i have already spent a ton of time on this problem, so any help would be appreciated.

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How to improve myself? Hello I am a first year student and at the start of the year I sign up for an extracurricular( I don't know how to translate from Romanian) which was "Competitive programming". I started working on codeforces and another Romanian websites problems to better myself. However since that in the 11th and 12th grade I needed to fast forward all the basic C++ algorithms and data structeres so I can pass my national exam and the admission exam for my university I wasn't able to focus on learning C++ for CP. Now, I work in my free time codeforces problems and participated in a few contests, but I am dissapointed in me, because I don't seem to improve. My question is how can I get better or evolve myself? Are there websites or books where I can learn or practice? Or do I just keep doing problems and learn form mistakes or tutorials?

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About me Ayo wsg chat recently a guy named "Technoblade_never_dies" has made a LOT of fuss about cheaters and I have to say I am one of them Though of course I am not proud of it, but it's just frustrating how badly he wants attention. Low-key TECHNOBLADE would be so ashamed of people like him using his name. Someone said "why do VSS have this many cheaters lol" And I have an answer for you... Basically we are some fucking Pakistani Degenerates who want recognition and admission to this (prob best college/school of Pakistan) College called "Sundar Stem" (search them up) and there Is an online version of Sundar stem called Virtual Stem school (short for VSS) and we take online classes and lowk I also do it. Its to get recognized or be considered smart but I Quit using AI from today I will do everything with honesty and hardwork <3

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