Codeforces Round #502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2) > This round is in memory of Leopoldo Taravilse. > > Leopoldo Taravilse (ltaravilse) was a distinguished member of the competitive programming community in Argentina and Latin America. As a contestant, he reached the ACM-ICPC World Finals in 2010 and 2012, and was active in CodeForces and TopCoder. After 2012 he became a problemsetter for the ACM-ICPC South American regionals and the Argentinian Programming Tournament, and later coach for a World Finalist team in 2016. > > Leopoldo's passion was helping others realize their full potential in competitive programming. He taught at various competitive programming schools in Brazil, Cuba, Peru and Bolivia, and his role organizing the Argentinian Training Camp cannot be overstated. Under his wing, it grew from a small group of friends in 2010 to a major event featuring international sponsors and having hundreds of participants coming from all corners of Latin America. Through successive editions of the Training Camp, Leopoldo inspired s...

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Teams going to ACM ICPC World Final 2016 With many regionals around the world finished, I think it is time to start collecting teams that are going to World Final this year. Please help me adding information to the tables :) --- Europe ====== | **Region** | **Country** | **University** | **Member 1** | **Member 2** | **Member 3** | | --------- | ----------- | -------------- | ------------ | ------------ | ---------- | | NEERC | Russia | Ural Federal University | [user:Um_nik,2016-05-15] | [user:Umqra,2016-05-15] | [user:Merkurev,2016-05-15] | | NEERC | Russia | SPb State University | [user:Copymaster,2016-05-15] | [user:-XraY-,2016-05-15] | [user:ershov.stanislav,2016-05-15] | | NEERC ...

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Teams Going to the 2025 ICPC World Finals Baku Hello Codeforces! Since the [ICPC World Finals 2025](https://worldfinals.icpc.global) is approaching fast and the invitations seem to be sent, I decided to post a blog to gather Codeforces handles as I couldn't see one for this year. Please write a comment with the team informations and I will add them to the post. It would be great if you write the comments using this template: **Handles (or names), Region, Country, University** Asia East: -------------- <style> .table_component { overflow: auto; width: 100%; } .table_component table { border: 1px solid #dededf; height: 100%; width: 100%; table-layout: auto; border-collapse: collapse; border-spacing: 1px; text-align: left; } .table_component caption { caption-side: top; text-align: left; } .table_component th { border: 1px solid #dededf; background-color: #eceff1; color: #000000; padding: 5px; } .table_component td { b...

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The 2nd Universal Cup. Stage 26: Latin America (Latin America Championship 2024) Hello everyone! We are thrilled to invite you to **The 2nd Universal Cup, Stage 26: Latin America**, taking place on March 23rd, 2024. This stage is based on The 2024 ICPC Latin America Championship, which is the super-regional of the ICPC in the Latin America Region. Task setters and testers: [user:paulocezar,2024-03-22], [user:elsantodel90,2024-03-22], [user:mnaeraxr,2024-03-22], ASdeL, [user:VLamarca,2024-03-22], [user:Lebossle,2024-03-22], [user:WeakestTopology,2024-03-22], [user:arthur.nascimento,2024-03-22], [user:cabessa,2024-03-22], jpmarin, [user:MarcosK,2024-03-22], [user:MateoCV,2024-03-22], [user:wellvolks,2024-03-22], [user:crbonilha,2024-03-22], [user:kobus,2024-03-22], [user:pablobce,2024-03-22], and [user:MickyOr,2024-03-22]. We are looking forward to your participation! <spoiler summary="About Universal Cup"> About Universal Cup Universal Cup is a non-profit organization dedicated to providing trainings for competitive programming teams. Up to now, t...

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The 2024 ICPC Latin America Championship is near!! <div style="width: 100%; height: auto; max-width: 100%; overflow: hidden"> <img style="width: 100%; height: auto; display: block" src="https://acm.iteso.mx/share/pda2024.jpg" alt="" /> </div> <div style="text-align: center; margin-top: 10px"> <strong>Coordinated by ITESO University</strong> </div> <hr style="font-weight: 200" /> On **March 14**, the first ever ICPC Latin America Championship will begin, which will be called "Programmers of America" and will take place in Guadalajara. The regional contest represents the geographic area of Latin America. The contest is sponsored by Huawei, JetBrains, and Local Sponsors. The local website is available [here](http://pda2024.icpcmexico.org/). *42 teams* will participate, and the qualifiers for the World Final will be determined from them according to the [promotion rules](https://pda2024.icpcmexico.org/es/rules/). **Good luck to all teams!** <h1 style="margin-top: 30px">Qualified Teams</h1> ...

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The 2019 ACM-ICPC Latin America Regional Contest Hi, [The 2019 ICPC Mexico Finals](https://icpc.baylor.edu/regionals/finder/mexico-2019) starts in 30 minutes. Let's discuss the problems after the contest. There are some mirror contests starting 1h after the real one: - https://www.juezguapa.com/concursos/icpc-latin-america-2019-final-official-mirror - https://matcomgrader.com/contest/overview/6254 - https://www.urionlinejudge.com.br/judge/en/contests/view/496 This facebook page is posting updates frequently: https://www.facebook.com/acmitesochapter Streaming: - From Universidad de Oriente de Santiago de Cuba (Spanish): https://www.facebook.com/icpc.caribbean.media/videos/433791383990095/ Good luck to all the teams. **UPDATE** The contest has started. **UPDATE** Live scoreboard: https://global.naquadah.com.br/boca/score/index.php (use this if the previous one doesn't work https://global.naquadah.com.br/boca/scoreglobal.php?h=AT2oE0HBeAg8eox30q5wZOdk8SY_bIZ-hGKuX9OTrY661HqiWgHRra4KBYyrxV6IDqZeTVr7y...

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Teams going to ACM ICPC World Finals 2018 I think it's good time for collecting teams that are going to WF this year. Let's complete the table together :) Europe ====== | Count | Country | Region | University | Member 1 | Member 2 | Member 3 | | ----- | ------- | ------ | ---------- | -------- | -------- | -------- | | 1 | Belarus | NEERC | Belarusian State University | [user:progmatic,2018-04-12] | [user:Fedosik,2018-04-12] | [user:vilcheuski,2018-04-12] | | 2 | Estonia | NEERC | University of Tartu | [user:oml1111,2018-04-12] | [user:hoomas,2018-04-12] | [user:k__mas,2018-04-12] | | 3 | Kazakhstan | NEERC | Kazakh-British Technical University | [user:Zharaskhan,2018-04-12] | [user:AeonHQ,2018-04-12] | [user:NurlashKO,2018-04-12] | | 4 | Russia | NEERC | Moscow Aviation Institute | [user:mingaleg,2018-04-12] | [user:SirRembocodina,2018-04-12] | [user:i.trofimow,2018-04-12] | | 5 | Russia | NEERC | Moscow Institute of Physics & Technology | [user:Golovanov399,2018-04-12] | [user:Kostroma,2018-04-12] | [user:I_hate_A...

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ICPC WF 2026 Team List Hello Codeforces, Earlier this month, the ACPC (African and Arab Collegiate Programming Championship) concluded, determining the teams qualified for the ICPC World Finals from our region. I decided to write a blog post to gather the full team list somewhere (yes, I know this is very early and most championships are still in March, but I'm so excited anyway, and I already had the script for the ACPC list, so why not!) To add your team to the list, please comment these details: - Your region - Your country - Your university - Your team name - Team members' handles Wish everyone the best of luck in preparing for the ICPC, and can't wait to meet you all! <h2>Northern Eurasia</h2> <table> <tr> <th>Country</th> <th>University</th> <th>Team Name</th> <th>Member 1</th> <th>Member 2</th> <th>Member 3</th> <th>Team Rating</th> </tr> <tr> <td>Russia</td> <td>HSE University</td> <td>FFTilted</td> <td><a href="https://codeforces.me/profile/teraqqq" style="color...

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ACM-ICPC World Finals 2017: News <img src="https://icpc.baylor.edu/cms/welcome-banner-2014/2017FinalsRollerv1.jpg" style="width:500px; float:right; margin: 0 1em 1em 1em;"/> Hello, Codeforces! The ACM-ICPC World Finals 2017 event is running now. Tomorrow will be the main contest. During these days the directorate of ACM-ICPC shared some news. * Let me remind you that this season (2016-2017) is last, when the general sponsor of the championship is IBM. For 20 years, IBM has supported ACM-ICPC, investing millions of dollars annually. Thank you, IBM! At the moment, the model is actively being worked out, when there will be not one general sponsor, but there will be a fund in which several companies will participate. At the opening ceremony the Sport Programming Foundation was mentioned. I believe this Foundation will be the main one for the future seasons of the championship. However, these are not yet close plans. It was announced that the next three years the general sponsor of ACM-ICPC will be JetB...

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Teams Going to the 2026 Latin American Championship Hello! Oi! ¡Hola! On March 7th, the ICPC Latin American Finals will be happening in Santiago, Chile! For more information check out the official website: https://latam2026.icpc.cl/en/ The official list of teams can be found [here](https://icpc.global/regionals/finder/Latin-America-Champ-2026/teams). Below are the teams and please help out in the comments. Huge thanks to [user:FedeNQ,2025-02-12] for helping out with this and being really awesome! # Qualified Teams <table><thead><tr><th>Region</th><th>Country</th><th>University</th> <th>Member1</th> <th>Member2</th> <th>Member3</th> <th>Rating</th></tr> </thead> <tr><td>Brazil</td><td>Brazil</td><td>[UNICAMP] Naim continua dentro de nós</td><td>[user:defnotmee,2026-02-12]</td><td>[user:lobolobo,2026-02-12]</td><td>[user:enzopsm,2026-02-12]</td><td>2578.2546 </td></tr> <tr><td>Brazil</td><td>Brazil</td><td>[UnB] Los Tralalelitos dizem FLAMENGOOO</td><td>[user:cebolinha,2026-02-12]</td><td>[user:vilsu,2026-02-12]</td><td>[user...

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Osijek Competitive Programming Camp, Winter 2024 Hi everyone! <center><a href="https://ocpc.mathos.unios.hr"><img src="https://ocpc.mathos.unios.hr/images/ocpc.svg" height="100px"></a> <a href="https://icpc.foundation/"><img src="https://ocpc.mathos.unios.hr/images/ICPC.svg" height="100px"></a></center> <center> <b>Sponsored by</b><br> <a href="https://www.janestreet.com/join-jane-street/open-roles/?type=students-and-new-grads&location=london"> <img src="/predownloaded/ee/f2/eef26616a3661c658d1545f18ed21fabb14d5871.svg" height="50px" style="margin: 5px 5px 5px 5px;"> </a> <a href="https://pinely.com/"> <img src="/predownloaded/0a/0f/0a0f3f67435d1f6e467bc7203d4a2090ba8f92cc.svg" height="50px" style="margin: 5px 5px 5px 5px;"> </a> </center> After successful camps last year ([winter wrap](https://codeforces.me/blog/entry/113438), [fall wrap](https://codeforces.me/blog/entry/121684)), we are happy to announce that Osijek camp will be returning on **17.-25. February 2024** &mdash; just in time to prepare for the Wor...

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Latin American Regional Contests ICPC 2023 Teams Hello CF! **Next October 21st**, the regional contests in Latin America of the current ICPC cycle will be held simultaneously. These competitions will determine the teams that qualify for the Latin American Final. Although there is a list of the teams that will participate officially, I would love to know more about the competitors. What's your ICPC team in this edition? </br> <h1>All Teams with MaxRating</h1> <spoiler summary = "Open list"> <h1>All</h1> <table style="overflow: auto;"> <tr style="background-color: rgb(230, 224, 224);"> <th>Rank</th> <th>Name</th> <th>Country</th> <th>Member 1</th> <th>Member 2</th> <th>Member 3</th> <th>Rating</th> </tr> <tr style="background-color: rgb(255, 255, 255);"> <td>1</td> <td>teambrbr002</td> <td>Brazil</td> <td>[user:fmota,2023-10-16]</td> <td>[user:emaneru,2023-10-16]</td> <td>[user:MvKaio,2023-10-16]</td> <td>2662.6438</td> </t...

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2024 Latin American Championship Teams On *October 21*, the regional competitions were held to determine the teams that will participate in **The 2024 ICPC Latin America Championship**. *404 teams* participated and *357 of them* solved at least one task. [Here](https://scorelatam.naquadah.com.br/latam-2023/) you can see the official standings. According to the qualification rules, **20 slots** should be allocated to the best-performing teams from all Latin America, with a general rule of at most **2 teams from the same institution**. The rest of the qualifiers will be chosen according to the algorithm established [here](https://drive.google.com/file/d/186s5Od43Dok_g5ILZYwPXEhstmmIlKoX/view). **UPD1: There will be a total of 42 spots!!** In addition to the initially considered 40 spots, the ICPC LATAM Steering Committee has approved 2 additional spots for the best all-female team in all of LATAM and for the best team from the host region **UPD2:** The [list](https://icpc.global/regionals/finder/Latin-America-Cha...

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Teams Going to the 2025 Latin American Championship Hello! Oi! ¡Hola! On March 16th, the ICPC Latin American Finals will be happening in Salvador, Bahia, Brazil! For more information check out the official website: https://pda2025.gruproufba.com.br/ The official list of teams can be found [here](https://icpc.global/regionals/finder/Latin-America-Champ-2025/teams). Below are the teams and please help out in the comments. Huge thanks to [user:FedeNQ,2025-02-12] for helping out with this and being really awesome! # Qualified Teams <table><thead><tr><th>Rank</th> <th>Country/Region</th><th>University</th> <th>Member1</th> <th>Member2</th> <th>Member3</th> <th>Rating</th></tr> </thead> <tr><td>1</td><td>Brazil</td><td>[USP] Faça o WM</td><td>[user:nathan_luiz,2025-03-11]</td><td>[user:wnmrmr,2025-03-11]</td><td>[user:antoniomsah,2025-03-11]</td><td>2497.1878 </td></tr> <tr><td>2</td><td>Brazil</td><td>[UFMG] Torcida Pão de Alho™</td><td>[user:MvKaio,2025-03-11]</td><td>[user:perchuts,2025-03-11]</td><td>[user:gustavocruz,2025-03...

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2022-2023 ICPC Latin American Regional Programming Contest — Unofficial editorial Hi everyone! The [2022-2023 ICPC Latin America Regional Programming Contest](https://codeforces.me/gym/104252) was held last weekend. Given that (as far as I know) there is no official editorial for the problems, I decided to create one. Please notice that, given that these are not the official solutions, there can be typos/mistakes in the explanations. Feedback is always appreciated :) I would like to thank [user:lsantire,2023-03-22] for reviewing the editorial and providing valuable feedback. Don't hesitate to reach out to me if you have any questions/suggestions. Thank you! [problem:104252A] <spoiler summary="Hint"> Think in which case a person loses money. Remember we can choose the order in which events happen. </spoiler> <spoiler summary="Solution"> Let's fix a person $p$ and call $a$ and $b$ to the people $p$ will ask for money. It's easy to see that $p$ loses money if $a$, $b$ and $p$ are asked for money before $p$ requests $a$ or $b$ to pay. This ...

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2025-2026 ICPC Latin American Regional Programming Contest @ CF GYM Hello, Codeforces! The **[contest:106178]** was held last weekend, and the full problem set is now available on Codeforces Gym for virtual participation and upsolving. Whether you want a team practice or a solo grind, you're invited to try it and discuss solutions here. This contest is part of the ICPC 2025-2026 cycle for Latin America and serves to select the teams for the Latin America Championship (March 2026, Chile). This year's regional had 558 official teams from 18 countries, competing simultaneously across 16 sites throughout the region. You can check the official results here: https://scorelatam.naquadah.com.br/latam-2025/. Huge thanks to the LATAM jury who prepared and tested the tasks, and to all the volunteers who helped run the onsite events. The problems were written and prepared by Alejandro Strejilevich de Loma, [user:andremfq,2025-11-12], [user:brunomont,2025-11-12], [user:gpoesia,2025-11-12], Inés Kereki, [user:lsantire,2025-11-12], [user:mnaeraxr,2025-11-12]...

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The 2026 ICPC Latin America Championship @ CF GYM Hello, Codeforces! **[contest:106416]** was held last weekend, and the full problem set is now available on Codeforces Gym for virtual participation and upsolving. Whether you want a team practice or a solo grind, you're invited to try it and discuss solutions here. This contest brings together the top teams from the ICPC Latin America Regional Contests of the 2025–2026 season. The championship was held in Chile on March 7, 2026, where qualified teams from across the region competed for the title and for advancement to the ICPC World Finals. You can check the official results here: https://scorelatam.naquadah.com.br/pda26/. There was also a mirror on the ICPC-LA CF Group (see [contest:676963]). Huge thanks to the championship jury who prepared and tested the tasks, and to all the volunteers and organizers who made the event possible. The problems were written and prepared by Alejandro Strejilevich de Loma, [user:arthur.nascimento,2026-03-11], [user:brunomont,2026-03...

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Discrimination on the programming contest community I've been thinking of this lately, and I realized that we can't allow this to keep happening. There is a serious discrimination problem in the programming contest community and we can't act as if it doesn't happen. The first problem I saw was the IOI in Iran, a country that discriminates people according to their religion. How many of you know that Jewish people can't enter into Iran? What does it mean? If you are Jewish, just for your religious beliefs, you can't go to the IOI. That was the first thing I noticed that I think is a serious problem, but then I saw something else, that I felt that I had to share with all the community, and ask everyone in the competitive programming community to please share with everyone and try, all together, to see if we can make the people in charge of this to make a decision that changes this horrible discriminative situation. I was in Cuba in the last three weeks. I was in charge of the Caribbean Training Camp for competitive programming. I...

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Shortest Path Modelling Tutorial Shortest path problems are really common. There are uncountable problems that can be reduced to some shortest path problem on graph. In this post i will show some different problems that require some extra thinking because they are not the usual shortest path problems (there are additional constraints to the problem). For most high rated coders this is still common stuff but i hope i can help some newcomers out there. About Graph Modelling ------------------ Sometimes we face a problem that asks us to find some shortest path in a graph, but there are additional constraints to the problem. If we are not used to this kind of problem, we may come up with the idea of changing Dijkstra's algorithm so it will work in the specified problem. But usually this will not work. Instead, we must change our graph so that the traditional shortest path algorithm will solve the problem with added constraints. This is called graph modelling. State Graphs ------------------ What we want to b...

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Our adventures on Unicamp 2026 Introduction ================== Over the past two weeks, my friends [user:jackson.souza,2026-01-31], [user:pedrinho_eu,2026-01-31], [user:holanda2103,2026-01-31], [user:realani,2026-01-31], and I attended the ICPC Brazilian Summer School — an event that brings together competitive programming students from Latin America. During this time, we studied full-time, fully focused on the competitions that will take place throughout the year. Also, we had some cool adventures that I would like to share with you. 1. The water ------------------ When we arrived, one of the first things we realized we needed was water. We went to the mall, but the Carrefour was already closed. So we stopped by a small local market on the way to the hotel where we would be staying for the next few weeks. At that point, [user:realani,2026-01-31] and [user:holanda2103,2026-01-31] decided to head back to the hotel, while the rest of us stayed behind to deal with the water situation. As they were lea...

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2018-2019 ACM-ICPC Latin America Regional Contest I'm posting this blog so we can discuss the solutions to the problems of 2018-2019 ACM-ICPC Latin America Regional Contest. Links to problems: [A &mdash; A Symmetrical Pizza](https://www.urionlinejudge.com.br/judge/es/problems/view/2903) [B &mdash; Building a Field](https://www.urionlinejudge.com.br/judge/es/problems/view/2904) [C &mdash; Cheap Trips](https://www.urionlinejudge.com.br/judge/es/problems/view/2905) [D &mdash; Database of Clients](https://www.urionlinejudge.com.br/judge/es/problems/view/2906) [E &mdash; Escape, Polygon!](https://www.urionlinejudge.com.br/judge/es/problems/view/2907) [F &mdash; Fantastic Beasts](https://www.urionlinejudge.com.br/judge/es/problems/view/2908) [G &mdash; Gathering Red-Black Fruits](https://www.urionlinejudge.com.br/judge/es/problems/view/2909) [H &mdash; Highway Decommission](https://www.urionlinejudge.com.br/judge/es/problems/view/2910) [I &mdash; Ink Colors](https://www.urionlinejudge.com.br/judge/es/problems/v...

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Breaking the Language Barrier: Official Problem Translations for Major Languages Hello Codeforces Community! First of all, I want to express my deep appreciation for this amazing platform. Codeforces has been the ultimate home for competitive programmers worldwide, helping us learn, compete, and grow. However, I would like to discuss a challenge that affects a massive segment of our community: The Language Barrier. At its core, competitive programming is a test of logical thinking, mathematical skills, and algorithmic knowledge—not an English reading comprehension test. While English and Russian are the primary languages for problem statements, many talented participants from non-English speaking regions struggle not with the logic of the problem, but with misunderstanding subtle linguistic details in the problem description during the pressure of a contest. The Proposal: I would like to suggest a system where Codeforces officially supports problem translations in other widely spoken global languages, especially during official rounds. Alongside Eng...

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Latin America Regional Contest 2015 Hi, Tomorrow is the Latin America Regional Contest, there is an online mirror prepared in [UVA](https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=12&page=show_contest&contest=352), you can see your local time [here](http://www.timeanddate.com/worldclock/fixedtime.html?msg=Latin+America+Regional+2015+Mirror&iso=20151114T13&p1=155&ah=5). Good luck to all participants. **Update:** Here are the live-scoreboard: [Latin America](http://bombonera.org/board/) [Carribean](http://live.uci.cu/acm-icpc/) **UPDATE 2:** Final results: [Mexico and Central America](https://icpc.baylor.edu/regionals/finder/mexico-central-america-2015/standings) [Caribbean](https://icpc.baylor.edu/regionals/finder/cf-2015/standings) Secret IO: http://maratona.ime.usp.br/resultados15/ **UPDATE 3** Brief editorial in Spanish: http://caloventorendos.blogspot.com.ar/2015/11/regional-latinoamerica-2015-solucionario.html **UPDATE 4** Detailed editorial in Spanish: h...

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Help Venezuelan team to compete at the ACM ICPC World Finals 2018 Hi Codeforces community! I write on behalf of the team "Super Pollos", a Venezuelan team who made it to the third place at the ACM ICPC Latin American Regional Contest &mdash; South America North region. With this place, the team earned its first qualification to the ACM ICPC World Finals! Which most of us know will be held at the city of Beijing! Recently we are facing a very stressful situation. We are really short of money and time, and as the date of the competition gets closer, the tickets cost gets higher and higher! We don't have an American Visa, so our trip cannot make stops at the USA, and this make the air tickets even more expensive! We need at least three tickets to Beijing, one for each contestant obviously! But we wish to have 4 tickets, in order to make this trip possible for our coach too! We have been looking for air tickets prices, and a Caracas-Beijing (Round trip) ticket that doesn't make any stop at the USA (or a country which requires a visa for t...

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Competitive programming: an underrated sport in Colombia **_Hello everyone. Later, I wrote a text about the situation regarding competitive programming in Colombia. I guess this is a situation that many countries may face so I would like to publish it here._**  In recent years, competitive programming (CP) has gained prominence as a key criterion for companies looking to hire skilled professionals. William Lin defines CP as “a mind sport where participants need to write programs to solve well-defined problems.” Notably, some have represented Colombia on international stages such as Japan, Indonesia, and Egypt while they were in the school. But one critical question arises: How does Colombia fare in this global sport? The answer is disheartening. While the country has produced exceptional competitors, the community remains small and concentrated in cities like Bogotá and Medellín. A few talented individuals hail from other regions like the Amazon, Pereira, ...

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[#strings #ICPC #LATAM #2006] Jukebox — can we do better than backtracking + suffix array + sparse table + binsearch? I'm trying to solve problem Jukebox from ICPC Latin America Regional 2006. You can read the problem statement and submit solutions [here](https://www.urionlinejudge.com.br/judge/en/problems/view/1406). You can also find the official inputs and outputs [here](http://maratona.sbc.org.br/hist/2006/final/contest/jukebox.in) and [here](http://maratona.sbc.org.br/hist/2006/final/contest/jukebox.sol). Please, read the problem statement to understand all the details, but here is an attempt of a summary: Basically you are given N songs, each song with a title and an artist. There is at most 30 songs, 6 artists and all strings are at most 30 characters long each. For each song, you can decide if you keep or hide the artist. Your task then is to find the optimal way of keeping/hiding artists such that the sum total of the lengths of the songs' golden strings is minimized. A song's golden string is any shortest substring of either the song's title or artist (if the artist is not hidden) such th...

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Teams going to ACM-ICPC World Finals 2019 Completed List! [user:Luqman,2019-01-30] said he [isn't creating a chart](https://codeforces.me/blog/entry/64899?#comment-488294) of teams going to ACM-ICPC this year as he isn't competing, so I added in all the teams. Let's complete the table together! For the teams where I don't know the cf handles of the team members, I put their names instead. Europe ====== | Count | Country | Region | University | Member 1 | Member 2 | Member 3 | | ----- | ------- | ------ | ---------- | -------- | -------- | -------- | | 1 | Romania | SEERC | Alexandru Ioan Cuza University of Iași | [user:Juve45,2019-01-31] | [user:Cristian1997,2019-01-31] | [user:Sin,2019-01-31] | | 2 | Switzerland | SWERC | ETH Zürich | [user:TimonKnigge,2019-03-08] | [user:zaspagety,2019-03-08] | Stefanie Zbinden | | 3 | Netherlands | NWERC | Leiden University | [user:pimsp,2019-03-08] | Onno Berrevoets | Daan van Gent | | 4 | Ukraine | SEERC | National Technical University "Kharkiv Polytechnic Institute" | [user:vlad8,2019-02-0...

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ACM ICPC Latin America 2011 <p</p><p</p><p</p><div>Problem Set and Data Set: <a href="http://blog.vudduu.com/2011/12/acm-icpc-latin-america-2011.html">Acm-icpc-latin-america-2011</a></div><div><br /></div><div><div>- <a href="http://blog.vudduu.com/2011/12/acm-icpc-latin-america-2011-army.html">A - Army Buddies (Data Structure, List)  --&gt; C++ Code</a></div><div>- <a href="http://blog.vudduu.com/2011/12/acm-icpc-latin-america-2011-b-ball.html">B - Ball Stacking (DP) --&gt; C++ Code</a></div><div>- C - Candy's Candy (Math)</div><div>- E - Electrical Pollution (Graph Traversal)</div><div>- F - File Retrieval (Stack, Suffix Array)</div><div>- G - Garden Fence (Sweep Line)</div><div>- H - Hedge Mazes (Graph Bridges, Strongly Connected Components)</div><div>- <a href="http://blog.vudduu.com/2011/12/using-namespace-stddefine-foriab-forint.html">I - In Braille (Implementation)  --&gt; C++ Code</a></div><div>- <a href="http://blog.vudduu.com/2011/12/acm-icpc-latin-america-2011-j-jupiter.html">J - Jupiter Atacks! (RMQ, ...

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Latin America Regional Contest 2016 Hi, Today was held the Latin America Regional Contest. The problem set can be found here (sadly it requires an account): https://www.urionlinejudge.com.br/judge/en/challenges/contest/211 The results can be found here: http://score.acmicpc-latam.org/ Congrats to the winners! * 1st &mdash; UH++ (Cuba) * 2nd &mdash; PUMMAS (Argentina) * 3rd &mdash; [UFPE] 0xE (Brazil) * 4th &mdash; UNICAMP] Veni Vidi Codi (Brazil) * 5th &mdash; PUCP-FCI O(1) O(n) O(u(n)) [Peru]

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ACM ICPC Latin America 2010 <div><div><div><div>The problems you can download <a href="http://www.4shared.com/file/rfShhM2B/Problems_ACM_ICPC_2010.html">here</a>&nbsp;and you can test your solution in the <a href="http://acm.uva.es/archive/nuevoportal/">ACM ICPC Live Archive</a>.</div><div>The official scoreboards are located <a href="http://www.ic.unicamp.br/~rdahab/icpc2010/">here</a>.</div><div>Problems solved:</div><div><a href="http://blog.vudduu.com/2010/11/ants-colony-acm-icpc-latin-america-2010.html">A - Ants Colony</a></div><div><a href="http://blog.vudduu.com/2010/10/b-bingo-acm-icpc-latin-america-2010.html">B - Bingo!</a></div><div><a href="http://blog.vudduu.com/2010/11/d-digits-count-acm-icpc-latin-america.html">D - Digits Count</a></div><div><a href="http://blog.vudduu.com/2010/10/f-flowers-flourish-from-france-acm-icpc.html">F - Flowers Flourish from France</a></div><div><a href="http://blog.vudduu.com/2010/10/j-jollo-acm-icpc-latin-america-2010.html">J - Jollo</a></div></div><div><br></div><div><a...

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Teams going to ACM ICPC World Final 2017 Europe ================== | Count | Country | Region | University | Member 1 | Member 2 | Member 3 | | ----- | ------- | ------ | ---------- | -------- | --------- | -------- | | 1 | Russia | NEERC | St. Petersburg State University | [user:aid,2017-05-22] | [user:ershov.stanislav,2017-05-22] | [user:-XraY-,2017-05-22] | | 2 | Russia | NEERC | St. Petersburg ITMO University | [user:izban,2017-05-22] | [user:enot110,2017-05-22] | [user:Belonogov,2017-05-22] | | 3 | Russia | NEERC | Moscow Institute of Physics & Technology | [user:zemen,2017-05-22] | [user:ifsmirnov,2017-05-22] | [user:Arterm,2017-05-22] | | 4 | Russia | NEERC | Ural Federal University |[user:Tinsane,2017-05-22] | [user:kb.,2017-05-22] | [user:KungA,2017-05-22] | | 5 | Russia| NEERC | Perm State University | [user:I_love_Tanya_Romanova,2017-05-22] | [user:mmaxio,2017-05-22] | [user:KuchumovIlya,2017-05-22] | | 6 | Belarus| NEERC | Belarusian State University of Informatics and Radioelectronics |[user:netman,2...

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2025 ICPC South America — Brazil First Phase problem discussion Since usually there's no editorial for this contest (already on [Gym](https://codeforces.me/gym/106073)), I wrote explanations to my team's (thank you [user:leoanjos,2025-09-17] and [user:gabmei,2025-09-17]) solutions during the official mirror/bracket that retired people can participate, they're available at https://github.com/tfg50/competitive-programming-tutorials/blob/main/ICPC/Latin%20america/2025%20Brazil%20First%20Phase/editorial.pdf. Solutions have been posted on the same repository. Feel free to share your opinions on the problems, ask questions, and perhaps comment on some of the alternative solutions that I didn't mention or explain.

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Jeopardized Election — a problem no team in Latin America was able to solve (ICPC 2018) Hi, I'm trying to solve the problem [Jeopardized Election](https://www.urionlinejudge.com.br/judge/es/problems/view/2912). This was problem J in 2018 ICPC Latin America Regional Contest. No team in Latin America was able to solve it during the contest, check out the [final scoreboard](http://maratona.ime.usp.br/hist/2018/resultados18/resultadoslatam.pdf). I'm trying to figure out the solution but so far I can only think of the brute force approach, which is factorial and can't work. I've got a feeling that there must be a greedy strategy to solve it, but I'm not sure. It would be awesome if some of the genius minds here on Codeforces could shed some light on the solution. Thank you very much!

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Pig Latin  We are worried about racist tasks on Codeforces. We hope that the authors will apologize to all of Latin America community on Codeforces. [user:MikeMirzayanov,2019-01-23] please control who does what on Codeforces. We hope that it will never happen on Codeforces again. 

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ACM ICPC 2016 Brazil Sub-Regionals Today the ACM ICPC 2016 Brazil Sub-Regionals contest was held, featuring 12 problems and having more than 600 teams trying to advance to the Latin America Regional Finals that will happen in November. I created this thread so we can talk about the problems in the contest. The problems can be viewed in this link (Portuguese): http://maratona.ime.usp.br/maratona.pdf A &mdash; Simple ad-hoc B &mdash; Dynamic programming on DAG, binary search, square root decomposition C &mdash; Shortest Paths Modelling (i have a tutorial on this: http://codeforces.me/blog/entry/45897) D &mdash; Simple maths E &mdash; DP over subsets (bitmask dp) F &mdash; Graphs G &mdash; Range Sum Query 2D H &mdash; Simple palindrome check I &mdash; Greedy algorithm J &mdash; Sweep line K &mdash; DP, geometry L &mdash; DFS to check connected components My team solved 7 problems (A,C,D,G,H,I,L), we also tried to solve B and J but failed. Btw we have advanced to the regional finals!...

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Invitation to Torneo Argentino de Programación 2017 Hi CF. I would like to invite everyone to take part in the TAP this Saturday at 1pm GMT-5. This contest is the preliminary contest for the Argentinian teams. The mirror will be handled by the Red de Programación Competitiva, a group that host many contest over the year as training for the ICPC Latin America regional. Follow them at [Facebook](https://www.facebook.com/RedProgramacionCompetitiva/) You can register in the following [link](http://registro.redprogramacioncompetitiva.com/teams/new) and then enroll in the activity 11 of this Saturday [here](http://registro.redprogramacioncompetitiva.com/contests). The system used is BOCA, I think is a Brazilian system so maybe not everyone knows it, but you can test it in the past activities. For example [here](http://redprogramacioncompetitiva.com/contests/2017/09/) Just take some of the RPC-team free users and leave the password field empty, then change the password in the options menu and remember you user. The problems aren't in...

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The 2017 ACM-ICPC Latin America Regional Contest Hi, Tomorrow is going to be held The 2017 ACM-ICPC Mexico and Central America Finals (https://icpc.baylor.edu/regionals/finder/mexico-central-america-2017). Let's discuss the problems after the contest. Good luck to all the teams. **Update**: [Statements](https://www.dropbox.com/s/i8p0j2pvwl3bm7o/contest.pdf?dl=0) (thanks [user:aajjbb,2017-11-11]). **Update 2**: [Live Ranking](http://www.bombonera.org/score2017f2/score/). **Update 3**: The contest ended some hours ago, still no final ranking, if anyone gets it, share it please. **Update 4**: [Final Ranking](http://bombonera.org/score2017f2/results-secret42/board.html#), congratulations to the winners!! **Update 5**: [Solutions in Spanish](https://chococontest.wordpress.com/2017/12/07/solucionario-regional-south-america-2017/)

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ICPC Latin America Regional 2012 — Game of Tiles — is it really bipartite matching? how? why? Based on some spoilers I "know" that the problem [Game of Tiles](https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3975) from 2012 ICPC Latin America Regional Contest should be solved using maxflow / bipartite matching. However, I still haven't been able to figure out a correct solution for it based on bipartite matching. Does anybody know how to apply bipartite matching, or any algorithm for that matter, to solve the problem? If so, would you kindly share the logic behind your solution?

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Old/Classical problems on a regional? A time ago, I read this blog: [aleigorithms &mdash; ICPC Latin American Regional – 2017](https://aleigorithms.wordpress.com/2017/11/14/icpc-latin-american-regional-2017/) In that blog the author says "This is not an original problem. Is sad to see this kind of problems in an ICPC regional." when are explaining the solution to the problem ([F &mdash; Fundraising]( https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&category=788&page=show_problem&problem=6218)). A weeks ago I was talking with a friend about the 2017 Latin America Regional, and he told me that the problem [I &mdash; Imperial roads](https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&category=788&page=show_problem&problem=6215) is a classical/old question and not original and it's linked as a recomended problem on a tutorial. I looked a while trying to find the "original" problems and the tutorial, but until now I cannot find it. Somebody know where I can find t...

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Venezuela looking to do a competitive programming training camp, and needs your help. Greetings, we are a group of coaches in Venezuela that are very interested in taking our contestants to the next level in terms of competitive programming, a couple months ago we got invited to the Brazilian training camp, however due to economical issues in our country the trip was cancelled, however we don't want to give up on this matter and certainly don't want to fall behind the rest of Latin America. So we are looking for 1 or 2 people that would want to come here to do a training camp from March 14 til March 28, we want to be this camp at the level of an european regional contest. We are willing to pay: <br> -Transportation from your country to ours and back. <br> -Transportation from the airport to the hotel and back. <br> -Hotel. <br> -Food. <br> -Transportation from hotel to the training site and back. If you are interested and want specific details please contact one of our coaches: <br> -Venezuelan ACM Manager and...

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Judge Systems Hello everyone! <p> I am collecting information about judge systems, which are relatively freely available <p> Please if you have some informations or remarks write a comment. <p> <table> <tr> <th>Name</th> <th>Site</th> <th>Platform</th> <th>IOI support</th> <th>License</th> <th>Comments</th> </tr> <tr> <td>Ejudge</td> <td><http://ejudge.ru></td> <td>Linux</td> <td>Yes</td> <td>GPL</td> <td></td> </tr> <tr> <td>PCMS2</td> <td><http://neerc.ifmo.ru/trains/information/software.html></td> <td>Windows</td> <td>Yes</td> <td>?</td> <td>Nor support neither documentation is now provided for it</td> </tr> <tr> <td>DOMjudge</td> <td><http://domjudge.org></td> <td>Linux</td> <td>No</td> <td>GPL v2</td> <td></td> </tr> <tr> <td>Contester</td> <td><http://contester.ru></td> <td>Windows, Linux</td> <td>No</td> <td>Proprietary...

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Solutions of the 2024 ICPC Latin America Championship I'm posting this blog so we can discuss the solutions to the problems of 2024 ICPC Latin America Championship Link to the contest: https://codeforces.me/gym/105053 This is the final scoreboard: https://scorelatam.naquadah.com.br/pda24/

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How can I qualify to ACM ICPC World Finals 2018 being a sabbatist? I'm a brazilian student who has been training Algorithms for some years. I'm a seventh day adventist, religion that keeps the Sabbath holy. As a consequence of this I can't participate in the Latin America regional phase at all, due to the timezone. This is my last chance to go to ACM ICPC World Finals and it will be very difficult to my team to qualify without me. I'm not genious, but I have studied hard to do this competition. What should I do? Thanks in advance!

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ACM ICPC 2014 Latin America Finals Hello, yesterday we participated in ACM ICPC 2014 South America Finals in Brazil. We'd like to know if there are websites that we can check the final results from other regions. Also, if you have info on how to solve some problem, please post it here :D Thanks! Link to the online contest:http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=13&page=show_contest&contest=339

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Topcoder SRM 666 At midnight from tuesday to wensday [00:00 GMT](http://www.timeanddate.com/worldclock/fixedtime.html?&day=25&month=08&year=2015&hour=21&min=00&sec=0&p1=179) will be held [666th Topcoder SRM](http://community.topcoder.com/tc?module=MatchDetails&rd=16515). (Tuesday evening in the Americas, Wednesday night-evening in Eastern hemisphere) Learn Latin! :) In hell, nobody would speak to you in English! :) 

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Isosceles Triangles - Latin America Regional 2009 problem Hello, i have been trying to solve this problem for quite a while, i am aware this is kind of a standar geometry/counting problem. However the logic behind the solutions i read its pretty unclear to me, and since there is not outline at all, i decided to ask for the help of the CF community. Ok, so instead of dropping the link to the statement i'll explain the problem, you are given a set of points (which are less than 1000 points), your task is to tell in how many ways you can combine those points to make an isosceles triangle (no three points are collinear) . I have found many problems that follow this concept, and they just change the number of vertices, so i am pretty sure i want to understand the solution to the problem. if you can help me, that would be great, thanks! :)

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Asking for CIIC 2021 editorial Hi! Does someone from Latin America + Spain + Portugal know if there is a tutorial for this year's CIIC? I've been trying to solve the problems but I've been stuck for days. Thanks in advance

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Difference between Europe, Asia and Latin America What is the key for the successful of European and Asian teams? <br/> I'm from Latin American and I know that the best teams train a lot <br/> Maybe 10 years, but they never can be successful in Word Final or IOI <br/> Why that difference?

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Teams going to ICPC World Finals 2020 — WIP List Since I made [this blog](https://codeforces.me/blog/entry/65061) last year some people have asked me to create this since nobody has done it yet. So let's complete it together and I'll do my best on keeping it updated. Just like [user:Updown,2021-10-07] last year for the teams where I don't know the cf handles of the team members, I put their names instead. # Top 15 Over-All <table><thead><tr><th>Rank</th> <th>Country or Region</th><th>University</th> <th>Member1</th> <th>Member2</th> <th>Member3</th> <th>Rating</th></tr> </thead> <tr><td>1</td><td>USA</td><td>Massachusetts Institute of Technology</td><td>[user:Benq,2021-10-07]</td><td>[user:sqrtdecompton,2021-10-07]</td><td>[user:C_SUNSHINE,2021-10-07]</td><td>3673.1655</td></tr> <tr><td>2</td><td>China</td><td>Tsinghua University</td><td>[user:sunset,2021-10-07]</td><td>[user:fateice,2021-10-07]</td><td>[user:whzzt,2021-10-07]</td><td>3439.0416</td></tr> <tr><td>3</td><td>Russia</td><td>Nizhny Novgorod SU</td><td>[user:Um_nik,2021-...

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ACM ICPC 2017 Brazil Sub-Regionals On last saturday, ACM ICPC 2017 Brazil Sub-Regionals contest was held, featuring 13 problems and having more than 800 teams trying to advance to the Latin America Regional Finals that will happen in November. I created this thread so we can talk about the problems in the contest. The problems can be viewed in this link (Portuguese): http://maratona.ime.usp.br/prim-fase17/maratona.pdf This problems are in URI too: https://www.urionlinejudge.com.br/judge/pt/problems/origin/148 A &mdash; SegTree B &mdash; Simulation with dp C &mdash; LCM D &mdash; Prime divisors E &mdash; Simulation F &mdash; Simple sort G &mdash; Dp H &mdash; Max path on dag I &mdash; DFS/BFS J &mdash; %3 **K &mdash; I dont know** **L &mdash; I dont know** M &mdash; monkey problem Anyone know how to solve problems L and K?

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Latin America Regional 2003 Kryptonite Mine (Live Archive 2885) Hello i am having troubles with this problem, i am getting w.a and i really don't know what else to modify, so if you guys can help me that would be great, ill explain what i do in my solution 1- I construct a graph with edges between teleporters, ends of segments, the start position and the end position, (the weight of this edge is the euclid distance) and an edge connects 2 points if there is no line segment (excluding end and start points) 2- I run a dijkstra [N_points][N_teleporters] , if i find a teleporter i can move to other connected teleporters with 0 cost. 3- i use the function round(A) in the answer i don't know if my solution is ok, or it needs some other thing, here is my code for more detail about my actual solution: http://pastie.org/private/7fkh9k8ngg6ue940phydq Thanks a lot!

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ICPC Latin America Regional 2014 — Knights of the Round Table — Any tips on how to solve it? [Problem Statement](https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&category=658&page=show_problem&problem=4843). I read somewhere else ([here](https://codeforces.me/blog/entry/14650?#comment-196264)) that the linear version of the problem is much easier if you manage to find a split in the circle. I have no idea on how to find such a split, and I have no idea either on why the linear version should be "easy". Any insights will be appreciated.

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Teams going to ICPC WF 2022 (Egypt 2023) — WIP List Hi there! While we're waiting for the formal invitations to the ICPC World Final 2023, let's start the new post for the incoming competition, keeping the same idea of the [previous blog](https://codeforces.me/blog/entry/102593) As many of you already know, next WF will be something like a two-in-one competition, without knowing the actual format yet. I think it would be good to make two differents post, one per WF, because otherwise it would probably be a _very long_ post. Anyway, let the people decide :) _(I don't know if this poll works)_ Two posts: The same post: At least for now, we'll fill this post with teams of **THE FIRST WF** in Egypt, assuming that those are the qualified from Regionals **2021/2022**. (Trying to be more specific: the teams that qualified in the Regional held after the one that qualified to Dhaka) Please add a comment with your team information and I will add it to the post. Info preferre...

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[Preparing for ICPC] The Caribbean Training Contest #45 This is the last contest before ICPC México and Latin America, 5 hours contest, dont forget to check the time. http://coj.uci.cu/contest/contestview.xhtml?cid=1319 http://www.timeanddate.com/worldclock/fixedtime.html?day=5&month=11&year=2013&hour=12&min=30&sec=0&p1=99

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Teams going to ICPC WF 2024 (Kazakhstan 2024) — WIP List Hi there! While we're waiting for the formal invitations to the ICPC World Final 2024 &#127880;, let's start the new post for the incoming competition, keeping the same idea of the previous blogs. Please add a comment with your team information and I will add it to the post. Info preferred: **{Handles on CF (otherwise, real name), Region, Country, University}** If you see some mistake on the teams, any kind of correction would be appreciated &#128516; </table> # Top 15 Over-All <table><thead><tr><th>Rank</th> <th>Country/Region</th><th>University</th> <th>Member1</th> <th>Member2</th> <th>Member3</th> <th>Rating</th></tr> </thead> <tr><td>1</td><td>USA</td><td>Swarthmore College</td><td>[user:Geothermal,2024-09-08]</td><td>[user:silxi,2024-09-08]</td><td>[user:nitrousoxide,2024-09-08]</td><td>3569.1801 </td></tr> <tr><td>2</td><td>China</td><td>Tsinghua University</td><td>[user:Rebelz,2024-09-08]</td><td>[user:qazswedx2,2024-09-08]</td><td>[user:hehezhou,2024-09-08]...

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Teams going to ICPC WF 2021 (Dhaka 2022) — WIP List Since nobody has created the list yet, I reached [user:Laggy,2022-05-07] asking if he was gonna do it, but he hasn't reply, and so, I decided to create it myself. Please add a comment with your team information and I will add it to the post. Info preferred: {Handles on CF (or real names), Region, Country, University} Take in consideration that this list is for this year finals on Dhaka, Bangladesh : not for WF 2022 (that will be held in 2023) </table> # Top 15 Over-All <table><thead><tr><th>Rank</th> <th>Country/Region</th><th>University</th> <th>Member1</th> <th>Member2</th> <th>Member3</th> <th>Rating</th></tr> </thead> <tr><td>1</td><td>Japan</td><td>University of Tokyo</td><td>[user:maroonrk,2022-11-10]</td><td>[user:yutaka1999,2022-11-10]</td><td>[user:HIR180,2022-11-10]</td><td>3525.0983 </td></tr> <tr><td>2</td><td>USA</td><td>Massachusetts Institute of Technology</td><td>[user:slime,2022-11-10]</td><td>[user:matthew99,2022-11-10]</td><td>[user:jerry,2022-11-10...

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Teams going to ICPC WF 2023 (Egypt 2023, 2nd final) — WIP List Hi again! As we decided in [the other blog](https://codeforces.me/blog/entry/116946), let's have two differents lists, one per WF that will be held on Egypt. We'll fill this post with teams of **THE SECOND WF** in Egypt, assuming that those are the qualified from Regionals 2022/2023. Please add a comment with your team information and I will add it to the post. Info preferred: **{Handles on CF (otherwise, real name), Region, Country, University}** If you see some mistake on the teams, any kind of correction would be appreciated, also if you see here a team that belongs to the other post (or viceversa), let me know. </table> # Top 15 Over-All <table><thead><tr><th>Rank</th> <th>Country/Region</th><th>University</th> <th>Member1</th> <th>Member2</th> <th>Member3</th> <th>Rating</th></tr> </thead> <tr><td>1</td><td>Japan</td><td>&#129353; Tokyo Institute of Technology</td><td>[user:potato167,2024-05-01]</td><td>[user:tatyam,2024-05-01]</td><td>[user:noshi91,2024-05-...

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