Codeforces Practice Tracker — Browser Extension, -tracker/), Codeforces Practice Tracker helps to track your practice progress in codeforces
through time phases, Hi everyone! I'd like to share with you my new extension, [**Codeforces Practice
Tracker, I'd like to share with you my new extension, [**Codeforces Practice Tracker
**](https
→ Pay attention
→ Top rated
| # | User | Rating |
|---|---|---|
| 1 | Benq | 3676 |
| 2 | Kevin114514 | 3659 |
| 3 | jiangly | 3640 |
| 4 | turmax | 3450 |
| 5 | tourist | 3408 |
| 6 | strapple | 3360 |
| 7 | Um_nik | 3354 |
| 8 | squareOf105 | 3348 |
| 9 | maroonrk | 3312 |
| 10 | idontwannadothis…e | 3191 |
→ Top contributors
| # | User | Contrib. |
|---|---|---|
| 1 | Qingyu | 154 |
| 2 | nik_exists | 151 |
| 3 | maspy | 149 |
| 4 | AmShZ | 146 |
| 5 | Um_nik | 143 |
| 6 | Errichto | 139 |
| 7 | BledDest | 136 |
| 8 | adamant | 135 |
| 9 | maroonrk | 133 |
| 10 | cry | 130 |
→ Find user
→ Recent actions
You can use several words in query to find by all of them at the same time. In addition, if you are lucky search understands word forms and some synonyms. It supports search by title and author. Examples:
305— search for 305, most probably it will find blogs about the Round 305andrew stankevich contests— search for words "andrew", "stankevich" and "contests" at the same timeuser:mikemirzayanov title:testlib— search containing "testlib" in title by MikeMirzayanov"vk cup"— use quotes to find phrase as istitle:educational— search in title
Results
1.
Codeforces Practice Tracker — Browser Extension Hi everyone!
I'd like to share with you my new extension, [**Codeforces Practice Tracker**](https://chrome.google.com/webstore/detail/cnahgdhboflcnojgmeehhhfeoojifonm).
Codeforces Practice Tracker helps to track your practice progress in codeforces through time phases, It simply adds new tab to your profile (or any other profile) in this tab you can find data about each time phase.
For each time phase it shows:
- Number of solved problems.
- Number of submissions.
- Hardest (Max Rated) problem you solved.
- Average of the rates of the problems you solved.
- Number of contests and virtuals you participated.
- Statics of submissions.
Note: Gyms problems and unrated problems are only considered in number of solved problems and number of submissions.
More features:
- Show each phase and compare it with previous one.
- Skip inactive phases.
- Change number of days of each phase.
It ...
2.
Codeforces Data Scraping Websites There are many useful websites that extract data from Codeforces and give some statistics, problem recommendations, graphs, etc.
I thought that collecting them all in one place would be a good idea. Please comment the websites you find useful :D
List as of now:
- [CF-Predictor](https://cf-predictor-frontend.herokuapp.com/) ([Original Blog](https://codeforces.me/blog/entry/50411)): Predicts the expected rating change during and after contests.
- [Code-Drills](https://code-drills.com/) ([Original Blog](https://codeforces.me/blog/entry/48991)): Recommends problems for a list of user & gives statistics on total number of problems solved.
- [Codeforces Visualizer](https://cfviz.netlify.com/) ([Original Blog](https://codeforces.me/blog/entry/50326)): Gives various statistics for a user, and supports comparison between two users.
- [CF Statistics](https://cfstatistics.herokuapp.com/) ([Original Blog](https://codeforces.me/blog/entry/60775)): Comparison between 2 users ...
- [Codeforces Practice Tracker
](https://chrome.google.com/webstore/detail/codeforces-practice-track
3.
Codeforces Tracker # What is this site?
[cf-tracker][cf-tracker] is a website for monitoring progress on [codeforces.com][codeforces] in terms on which problems were solved in contests.
There are two types of problems to keep track on:
- The ones that were solved during the contest.
- The ones that were not solved during or after the contest [problems to upsolve later].
It also provides feature to filter contests based on division [div1, div2, div3, Educational Rounds], and is pretty damn quick about it.
# How can one use it?
- To upsolve problems.
- To find contests that you haven't participated in before and practice on them.
- Filter contests based on divisions for practice.
# How is this site built?
- The site is built entirely using [Vue.js][vue-js].
- It uses [codeforces api][codeforces-api] for fetching information.
- The contests information is statically stored as a `json` file, for...
Codeforces Tracker, , # What is this site? [cf-tracker][cf-tracker] is a website for monitoring
progress on, [cf-tracker]: https://cf-tracker.tech [codeforces]: https://codeforces.com
[vue-js]: https
4.
Codeforces Round 1040 (Div. 1, Div. 2) Editorial Thank you for participation and we hope you enjoy this round :)
<spoiler summary="How did you find the contest?">
- Great:
- Good:
- Average:
- Bad:
- Trash:
</spoiler>
<spoiler summary="Which problem is your most favourite?">
- D2A:
- D2B:
- D1A:
- D1B:
- D1C1:
- D1C2:
- D1C3:
- D1D:
- D1E:
- D1F1:
- D1F2:
</spoiler>
<spoiler summary="Which problem you hate the most?">
- D2A:
- D2B:
- D1A:
- D1B:
- D1C1:
- D1C2:
- D1C3: [likes:favorite,2039E3_...
Tutorial of Codeforces Round 1040 (Div. 1)
Tutorial of Codeforces Round 1040 (Div. 2)
5.
Codeforces Practice Tracker is back — Version 2.0.0 Hi everyone!
I know the extension has been unavailable on Chrome for a while. The old version was built on **Manifest V2**, and Google stopped accepting those extensions on the Web Store, so I had to rebuild it from scratch for **Manifest V3**. Codeforces Practice Tracker version 2.0.0 is now available.
For those who don't know it, Codeforces Practice Tracker adds a new Statistics tab to any Codeforces profile and helps you track your practice progress through customizable time phases.
**You can install it here:** [Chrome](https://chromewebstore.google.com/detail/cnahgdhboflcnojgmeehhhfeoojifonm?utm_source=item-share-cb) | [Firefox](https://addons.mozilla.org/en-US/firefox/addon/codeforces-practice-tracker/)
UPD: Firefox version is now updated to 2.0.1. All future updates will be released for both Chrome and Firefox.
---
## What's new in v2.0.0
- Fully rebuilt with Manifest V3
- Customizabl...
Codeforces Practice Tracker is back — Version 2.0.0, from scratch for **Manifest V3**. Codeforces Practice Tracker version 2.0.0 is
now available., to rebuild it from scratch for **Manifest V3**. Codeforces Practice Tracker
version 2.0.0 is now, /codeforces-practice-tracker/), For those who don't know it, Codeforces Practice Tracker adds a new Statistics
tab to any
6.
Codeforces Extensions Hello everyone!
I have collected some codeforces extensions that were created by users.
<ul>
<li>CF-Predictor — Know your rating changes <a href = "https://codeforces.me/blog/entry/50411">Blog Link</a></li>
<li>Codeforces Practice Tracker — Browser Extension <a href = "https://codeforces.me/blog/entry/78203">Blog Link</a></li>
<li>Presenting Codeforces Optimal Theme <a href = "https://codeforces.me/blog/entry/82680">Blog Link</a></li>
<li>UpSolve.me | Efficient Codeforces Practice <a href = "https://codeforces.me/blog/entry/79151">Blog Link</a></li>
<li>Colorize standings by used programming language <a href = "https://codeforces.me/blog/entry/1871">Blog Link</a></li>
<li>[UPD: 22 July 2020 -- v.1.2] Codeforces Enhancer — Chrome Extension <a href = "https://codeforces.me/blog/entry/18850">Blog Link</a></li>
<li>Multiple rating graph with other accounts <a href = "https://codeforces.me/blog/entry/1743">Blog Link</a></li>
<li>Google Chrome extension for autom...
">Blog Link
* Codeforces Practice Tracker — Browser Extension
7.
Codeforces Round #785 (Div. 2) Editorial I am sorry for the weak tests in B, for C being a little standardish and for misjudging the relative difficulties of E and F. Nevertheless, I hope you enjoyed the round. Here is the editorial. Do provide your feedback on each problem so that I can improve upon them the next time.
#### [A. Subtle Substring Subtraction](https://codeforces.me/contest/1673/problem/A)
<spoiler summary="Hint 1">
Greedy
</spoiler>
<spoiler summary="Hint 2">
The answer depends on whether the length of $s$ is even or odd and on the first and last characters of $s$ if the length is odd.
</spoiler>
<spoiler summary="Tutorial">
The problem can be solved greedily. Let $n$ be the length of the given string.
- If the $n$ is even, it is always optimal for Alice to remove the whole string.
- If the $n$ is odd, it is always optimal for Alice to remove either $s_1s_2\ldots s_{n-1}$ or $s_2s_3\ldots s_n$ based on which gives the higher score and then Bob can remove the remaining character ($s_n$ or ...
building $B_{i,j}$, the tracker will always return a fixed value $A_{i,j}$
such that all $A_{i,j, there can now be only one building corresponding to each value returned by the
tracker.
Tutorial of Codeforces Round 785 (Div. 2)
8.
Polygon Updates (Fall-Winter 2014) <a href="https://polygon.codeforces.com/"><img src="https://polygon.codeforces.com/image/polygon-logo.PNG" style="float: left; margin: 1em 2em 1em 1em"/></a>
Hi Codeforces!
My name is Maxim Gusarov and I joined the Codeforces developer team in September and am recently working with Vitaly [user:kuviman,2014-12-24] Kudasov on improving the [Polygon](https://polygon.codeforces.com/) system.
Today I would like to introduce you to the new potential of the system where all problems for the Codeforces rounds and many other programming contests are prepared.
#### Update 1
As a user logs into the system, she can now use either the login or the email given at the registration. You can also attach the session to the IP address to enhance security.
<center>
<img src="http://assets.codeforces.com/images/polygon-post/login-by-email-and-attach-to-ip.png"/>
</center>
#### Update 2
Any user who has the access to edit a problem can become its supervisor. The supervisor will always...
public [github issue tracker
](https://github.com/Codeforces/polygon-issue-tracking/issues). There you can, ://polygon.codeforces.com/) page now has a link to the public [github issue
tracker](https://github.com/Codeforces, tracker](https://github.com/Codeforces/polygon-issue-tracking/issues).
9.
# CF Tracker – Track Your Codeforces Progress Like Never Before **Hello Codeforces! **
I’m excited to share a personal project I’ve been working on: CF Tracker — a full-featured analytics tool to help you and your friends monitor progress on Codeforces with clean visualizations and real-time stats.
Live link : [https://cfanalyzerbit.onrender.com/](https://cfanalyzerbit.onrender.com/)
** What is CF Tracker?**
CF Tracker is a full-stack web app that uses the Codeforces API to provide deep insights into your performance, consistency, and strengths as a competitive programmer.
Whether you want to stay consistent, analyze your weaknesses, or compare with friends, this tool is built for you.
** Key Features**
** Today's Stats**
****Problems solved today
- Number of submissions
-
- Verdicts: AC, WA, TLE, etc.
-
- Problem rating distribution for today
** All-Time Statistics**
- Problem Solving Progress (line chart – 30 days, 6 months, all time)
-
- Contest Rating Graph (rating, rank, rating changes)
-
- Submission Activit...
# CF Tracker – Track Your Codeforces Progress Like Never Before, ** What is CF Tracker?** CF Tracker is a full-stack web app that uses the
Codeforces API to, **Hello Codeforces! ** I’m excited to share a personal project I’ve been
working on: CFTracker, So, I built CF Tracker to get those answers — and I hope it helps others too!
10.
Train Better with ThemeCPs (+ Website)! Hello Codeforces!
I am excited to share with you my competitive programming innovation which successfully propelled me to master (2100+)! This is the **<span style="color:black;">Theme</span><span style="color:red;">CP</span>** training method, which stands for **Themed <span style="color:red;">C</span>odeforces <span style="color:red;">P</span>rogressions**. Use at your discretion -- your Codeforces practice may get too effective and addictive!
**Want to read this blog in document form (with images)? Check out the following Google Doc!**
https://tinyurl.com/themecp
#### What is **<span style="color:black;">Theme</span><span style="color:red;">CP</span>**?
**<span style="color:black;">Theme</span><span style="color:red;">CP</span>** is an experimental training system wherein users train on a perpetual ladder for ratings in **[<span style="color:gray;">900</span>, <span style="color:black;">3</span><...
cherish the fact that you trained productively. You can also use the ThemeCP
tracker [**here**](https
11.
User script to keep track of your problem solving (Codeforces only) UPD: New version: Add problem title to the dashboard. [Screenshot](http://0x0.st/zUO8.png). Now you can tell easily what the problem is, without clicking through the link or add tags to describe the problem (although if you have existing tags, it's okay as well)
---------
A port of the [chrome extension](https://codeforces.me/blog/entry/59575) to Greasemonkey. I don't use Chrome, and so I decide to spend some time convert the chrome extension to greasemonkey userscript. I know that Chrome is the most popular browser, but I hope this can be useful to someone else. (there was somebody who [asked for a Firefox extension](https://codeforces.me/blog/entry/59575#comment-433350))
For now, the user script only works on Codeforces, and it uses localStorage. Also, because it "merges" a bunch of files into one, the resulting user script is not really maintainable. Anyway, as far as I've tested the works identically to the chrome extension (except that the "badge text" does not work)
...
this instead.  Link: [Codeforces upsolve tracker
](https, , and forget about them later, consider giving my chrome extension : [Upsolve
tracker](https, Link: [Codeforces upsolve tracker
](https://greasyfork.org/en/scripts/393478-codeforces-upsolve
12.
Codeforces AutoTracker | Track your everyday Codeforces Submission on Personal GoogleSheet ## Codeforces-AutoTracker
This application tracks your every day's Codeforces submission and write on GoogleSheet like your personal diary.<br>
(Also you can spy on your competitor friends like me.)
### Who should use it?
I never thought of sharing this simple project publicly. But when I talked to my friends about this, they said it helpful. So I think if you are not regular on coding and check if you are consistent or not, then you can use it. I do not recommend it for any consistent or regular coder. But irregular coders may use it as a tracker.
### Why I made Codeforces AutoTracker?
When I started my CS journey, I really loved to make different kinds of projects to satisfy my thirst of development rather than solving problem on online judges. Besides, it was our (most of the Asian) university-culture to participate in competitive programming or to practice problem-solving ...
each day and write it on google sheet.This is the story behind this tracker., regular coder. But irregular coders may use it as a tracker., ### Project on Github to Make your Tracker
13.
LaddersCF — A2OJ ladders with a measured training analysis (free, no account) Hi Codeforces! A while ago I shared [LaddersCF](https://codeforces.me/blog/entry/72781), a free tracker for the A2OJ ladders. The response was better than I expected — thanks to everyone who tried it and signed up for updates. The big update is now live: [codeforcesladders.web.app](https://codeforcesladders.firebaseapp.com)
What's new since the first post:
From 22 to 85 ladders. The classic A2OJ ones are still there (now corrected: duplicates removed, re-sorted by real problem rating — the "≥2200" ladder used to open with three 800-rated problems), plus generated ladders per rating band and per tag, reaching problems published after A2OJ froze in 2017.
Per-problem difficulty tiers inside each ladder. Raw solve counts are misleading — they correlate with problem age (Spearman −0.3 to −0.5 within a rating band) because the userbase grew — so counts are normalised against same-rating, same-year peers before ranking.
A new training analysis page: median solved rating over time, sh...
tracker for the A2OJ ladders. The response was better than I expected — thanks
to everyone who tried
14.
Introduction to CP Tracker -- A Web-Based Competitive Programming Archive & Management Tool Introduction
==================
CP Tracker (Competitive Programming Tracker) is a comprehensive tool I maintain for archiving and managing your competitive programming progress.
[Live Demo](https://competitive-programming-tracker.netlify.app/) | [GitHub Repository](https://github.com/lihaoze123/cptracker)
Core Highlights
------------------
* One-Click Import: Seamlessly import submission records from major platforms including Codeforces, AtCoder, Luogu, and QOJ.
* Visual Analytics: Built-in interactive charts and dynamic heatmaps intuitively visualize your daily activity and skill growth curves.
* Rich Text Support: Native rendering support for Markdown and LaTeX mathematical formulas.
* Data Flexibility: Full support for CSV import and export.
* Storage & Sharing: Supports local offline storage. You can also choose cloud synchronization to generate a personal public profile and share your pro...
Introduction to CP Tracker -- A Web-Based Competitive Programming Archive &
Management Tool, /0db3633acf00903acd27057b6dffcdfdd9547884.png) CP Tracker (Competitive
ProgrammingTracker) is a comprehensive tool I maintain for, After importing problems from platforms like Codeforces or AtCoder, use CP
Tracker to view your
15.
CF Elite Tracker — practice companion built on the Codeforces API # CF Elite Tracker — practice companion built on the Codeforces API
Hello everyone,
I’d like to share **CF Elite Tracker**, a small web app that uses the **public Codeforces API** to make training and lookup a bit faster in one tab. It does **not** replace Codeforces — all problem and profile links go to the official site.
- **Live app:** [https://cfelitetracker.vercel.app/](https://cfelitetracker.vercel.app/)
- **Help (features + behavior):** [https://cfelitetracker.vercel.app/help](https://cfelitetracker.vercel.app/help)
## What you can do without an account
- **Top** — Browse the rated leaderboard with filters (e.g. country, organization substring). From a handle you can open a **stats page** with **rating-change and submission heatmaps** (UTC days), **bar charts** of unique accepted problems by **problem rating** and by **tag**, and a short table of recent rated rounds.
- **User solved** — Enter any handle; see **unique accepted** problems merged with the global pr...
CF Elite Tracker — practice companion built on the Codeforces API, I’d like to share **CF Elite Tracker**, a small web app that uses the **public
Codeforces API** to
16.
Codeforces Solve Tracker Hello,
I have created this site [CFTracker](https://cftracker.netlify.app) ,which can be helpful for some for tracking contest solves. You can also filter by contest name or id like div. 1/div. 2 or whether you solved/attempted problems from the contest or not. Additionally you can browse problems list.
[Source Code](https://github.com/mbashem/codeforces-contest-solve-tracker)
**Update#01:** Light Theme Added
Codeforces Solve Tracker, list. [Source Code](https://github.com/mbashem/codeforces-contest-solve-tracker
) 
17.
Codeforces Friends Tracker — Browser Extension Introducing **Codeforces Friends Tracker** — Get submissions of your friends or your favourite Grandmasters for a particular Codeforces problem. It has been released and now avaiable across all major extension stores for free.
This extension enables you to track your friends' solutions to a particular CodeForces problem. Be it your friends or your favourite Grandmasters, use this extension to view their solutions at a single click from the problem page itself.
Download and Install Now :
1) [Google Chrome](https://chromewebstore.google.com/detail/codeforces-friends-tracke/gfdmmpimafkhcdekeddfeifcmcjbadam)
2) [Firefox Browser](https://addons.mozilla.org/en-GB/firefox/addon/codeforces-friends-tracker/)
3) [Microsoft Edge](https://microsoftedge.microsoft.com/addons/detail/kjglccdddnodokijnlanabbgpekaefom)
You can access the github repo of this project [here](https://github.com/07-priyanshu/Codeforces-Friends-Tracker).
<spoiler summary="Screenshots">
., /en-GB/firefox/addon/codeforces-friends-tracker/) 3) [Microsoft Edge](https, Introducing **Codeforces Friends Tracker** — Get submissions of your friends or
your
18.
Cities of Codeforces I ran [my code](https://github.com/NataIss/codeforces) on 28 May 2021. There were 345553 users in rating list. 87427 of them set field City in their profiles. There are 4009 unique values. Certainly some profiles might have fake values but anyway it is interesting to look at all these points on the map. Cities are marked by circle if there is at least one Codeforces user profile with this city name.
[cut]
_._
But what's about active users? There were 44188 of them, 13108 set City in their profiles. There are 1607 unique values.
It is rather impressive to compare active users map with actual global conflict map. The screenshot below is from [Global Conflict Tracker](https://www.cfr.org/global-conflict-tracker/?category=us) site. Codeforces users keep participating in contests even upon the very bad circumstances.
.
This skill will tell you about the upcoming contests to be held on various platforms(list given below).
Go, check it out. And give me your feedback. If you feel something should be there, or if something annoyed you please let me know about the same.
Thank you codeforces.
## Sample Invokations
- "Alexa, open contest tracker", "Are there any upcoming contests?"
- "Alexa, ask contest tracker are there any upcoming contests?"
- "Alexa, ask contest tracker are there any upcoming contests on Codeforces?"
- "Alexa, ask contest tracker are there any upcoming contests on Codeforces on 30th of March?"
- "Alexa, ask contest tracker are there any upcoming contests on Codeforces before 30th of March?"
- "Alexa, ask contest track...
Alexa skill — Contest Tracker, ## Sample Invokations - "Alexa, open contest tracker", "Are there any upcoming
contests, Hello codeforces, I'am proud to announce that my skill **Contest Tracker** is
finally live now
20.
CF Tracker **Hi! Codeforces community**
I have created a chrome extension that can tell you the amount of time you have spent on a problem from the moment you open it up for the first time.
The extension keeps track of the active window and thus the time increases only for that particular window.
It uses chrome local storage to store the data. In this way, it picks up from where it left off.
The extension overwrites the data every 10 seconds.
I believe that it could help newbies, pupils and maybe higher rated people to increase their speed.
Any suggestions for improvements or any bugs found are appreciated, and I would love it if you guys try this out.
You can download it from — https://chrome.google.com/webstore/detail/cf-tracker/hadiffebpglmdnknojeoelfgmjleiecc?utm_source=googleads&utm_medium=adgroup5&utm_campaign=adgroup5&utm_id=adgroup5&gclid=Cj0KCQiAjJOQBhCkARIsAEKMtO3OFxRkL3xVFOqO-5UAEjSYwNj...
CF Tracker, ://chrome.google.com/webstore/detail/cf-tracker
/hadiffebpglmdnknojeoelfgmjleiecc?utm_source=googleads&utm_medium
21.
Some Useful chrome extension for codeforces 1. [Carrot](https://chromewebstore.google.com/detail/carrot/gakohpplicjdhhfllilcjpfildodfnnn) predicts rating change and analys performance.
2. [CF Analytics](https://chromewebstore.google.com/detail/cf-analytics/hhljbjodjdbjbggddjaidojnlmaobcpo) Analyse profiles. Include statistics of problems solved. A bar chart showing problems solved for each problem rating, a doughnut chart displaying tags solved across any problem and also lists a count for each tag. The ‘Unsolved Problems’ shows a count of all problems attempted with not correct verdict and also lists them.
3. [CF Tracker](https://chromewebstore.google.com/detail/cf-tracker/hadiffebpglmdnknojeoelfgmjleiecc) keeps track of spent time on a particular problem.
4. [Codeforces Practice Tracker](https://chromewebstore.google.com/detail/codeforces-practice-track/cnahgdhboflcnojgmeehhhfeoojifonm) you can Read overview section of this extension.
**Bonus:**
[Dark Reader](https://chromewebstore.google.com/detail/dark-r...
count of all problems attempted with not correct verdict and also lists them.
3. [CFTracker, 3. [CF Tracker](https://chromewebstore.google.com/detail/cf-tracker, 4. [Codeforces Practice Tracker
](https://chromewebstore.google.com/detail/codeforces-practice-track
22.
Introducing CFinsights: Your One-Stop Solution to All Things Codeforces CFInsights — Your One-Stop Solution to All Things Codeforces
======
So you’re grinding CF contests and solving problems every day, but… how do you actually track your progress?
How do you know what’s working, what’s not, and what to fix? That’s why I made **CFInsights** — your full performance dashboard and comparison tool for Codeforces.
Try it here: https://cfinsights.netlify.app/
This blog will tell you:
- **What is CFInsights**
- **What are its two powerful modes**
- **Why I made it (and maybe you feel the same)**
- **How to reach out and suggest stuff**
Let’s go
What is CFInsights?
----
**CFInsights** is a web app that helps you deeply analyze your Codeforces performance and track your improvement.
It uses the official Codeforces API and gives you clean, easy-to-read dashboards — whether you're just starting out or already a specialist.
**You don’t need to sign up. Just enter your handle and get a full breakdown of your CP journey.**
The Two...
mentor would provide. It’s like a fitness tracker — but for competitive
programming. Wanna, visibility a coach or mentor would provide. It’s like a fitness tracker — but
for competitive programming.
23.
CF Gym Tracker – Track and Upsolve Gyms with Your Team When I was **practicing with my team** to prepare for **ECPC**, we realized something important:
While solving as many gyms as possible is great, **upsolving the gyms we had already attempted** was even more valuable.
But there was a problem...
Codeforces only shows the **last 10 virtual gyms** for each user, which made tracking our team’s progress quite difficult.
So, I decided to build a simple tool:
[ CF Gym Tracker](https://cf-gym-tracker.vercel.app/)
-----------------------------------------------------
https://cf-gym-tracker.vercel.app/
---
## Features:
### Team Progress Tracker
- Enter your handles (comma-separated).
- Choose gym difficulty and the solving mode.
- The tool will show all the gyms that these handles solved **together as a team**, and even display the **team name**.
---
### Upsolving Suggestions
- Enter your handles again, and the tool will suggest gyms **...
CF Gym Tracker – Track and Upsolve Gyms with Your Team, build a simple tool: [ CF Gym Tracker](https://cf-gym-tracker.vercel.app
24.
JHelper 0.18 Hi, Codeforces.
[Changelog](https://github.com/AlexeyDmitriev/JHelper/wiki/Changelog):
* 0.18
* CopyAction now regenerates output file
* 0.17
* Support for inline inlining for topcoder
* 0.16.4
* Support for WSL
* 0.16.3
* Support CLion 2020.1
* 0.16.2
* Support CLion 2019.1
* 0.16
* Auto switching to a file when changing task
* Auto selecting task when changing a file
JHelper is plugin for writing contests in C++. You may inline code from your own prewritten library so that you can submit only used code. Besides, it allows to test on tests you've added.
it's planned that you'll be able to parse a problem/contest and have all samples tests automatically added.
It's available for [CLion](https://www.jetbrains.com/clion/)
Plugin is completely free. IDE price is 89$/year, but it's free for students, have 30-days free trial and often you can use EAP(smth like beta)-versions for free.
You may download the plugin using JetBrains p...
ask what is unclear. Please post bugs and feature requests here or in [bug
tracker](https
25.
Proposal: Standardized Editorial URLs **Proposal: Standardized Editorial URLs (`/contest/xxxx/editorial`) & API Endpoint Support**
Finding tutorials for past Codeforces contests is currently far more inconsistent than it needs to be.
Depending on the contest author and round, editorials are scattered across different formats:
For anyone upsolving or building community tools (like browser extensions and problem trackers), this unpredictability causes constant friction.
**The Proposal**
Introduce a standardized URL alias and API endpoint for contest tutorials.
**1. Standardized Web Route**
Allow users to access any contest editorial via a single, predictable URL:
```
codeforces.com/contest/{contestId}/editorial
```
Practical Implementation & Settings:
- **Contest Manager Settings:** In the contest dashboard, coordinators or authors simply enter the `blogEntryId` (or external link) designated as the official tutorial.
- **Problem-Level Linking & Discussion:** [user:Errichto,2026-08-27] sugge...
26.
Tracker Codeforces::Тренировки <p>Hi all!<br /><br />My name is Max Shipko. I am lead programer of Codeforces::Gym sub-project. <span lang="en"><span>In this blog</span> <span>you</span> <span>can post</span> <span>bugs</span> <span>of the system</span> <span>relating to this </span><span>sub-project</span><span>,</span> <span>as well as</span> <span>your feature requests</span><span>.</span> <span>Codeforces</span> <span>team</span> <span>will make every effort</span> <span>to implement them.</span><br /><br /> <span>This is</span> <span>a purely technical</span> <span>blog.</span> <span>Please</span> <span>bring</span> <span>as much as possible</span> <span>the specific information and</span> <span>does not</span> <span>throw a</span> <span>lengthy</span> <span>discussion</span> <span>and</span> <span>exchange</span> <span>of views on the</span> <span>sub-project</span><span>.</span> <span>To do this,</span> <span>there is a <a href="http://codeforces.me/blog/entry/3676">special</a></span><a href="http://codeforc...
Tracker Codeforces::Тренировки
27.
Python Codeforces API Wrapper library Hi there!
I would like to introduce wrapper [library](https://github.com/soon/CodeforcesAPI) for Codeforces API written in Python 3. It helps you with collecting, analyzing and visualizing data.
####Intro:
As a contest member you may want to increase your power by solving problems, but some of them are quite simple, and you want to skip them. Lets say, you want to practice only Div2-C problems. You could, of course, open Problemset, then press `Ctrl+F` and write `C` to highlight preferable problems. But this may take a long time (you should look through the page and open only unsolved Div2 problems. A little boring, neh?).
Another way is write a script for loading all problems then filter only unsolved Div2-C problems and sort by solved count. Sounds interesting, isn't it? There is an [example](https://github.com/soon/CodeforcesAPI/blob/examples/examples/show_only_unsolved_problems/main.py) of such script. All you need is run it and input your codeforces handle, and it w...
already call policy and insect killers, what's next? Please, visit [issue
tracker](https, Please, visit [issue tracker](https://github.com/soon/CodeforcesAPI/issues) and
report this bug.
28.
a Telegram Bot to Track Your Daily Codeforces Progress Hello Codeforces!
I'm very excited to share a small tool I recently developed.
As competitive programmers, consistency is our key to success. We often want to track our daily solved problems or monitor our friends' progress to stay motivated. Checking profiles manually every day can be a bit tedious, so I decided to build a Telegram Bot to automate this!
**Codeforces Daily Tracker Bot**
You can try it here: https://t.me/Codeforces_tracking_bot
Main Features:
Multi-Handle Tracking: You can add your handle and your friends handles to track them all in one place.
Instant Reports: Send /now at any time to get a list of today's Accepted (AC) problems for all your added handles.
Daily Automated Summary: The bot will automatically send you a full summary of your daily achievements at the end of the day.
How to Use (Commands):
/add handle1, handle2 — Add one or multiple handles to your tracking list.
/remove handle — Remove a handle from your list.
/list — Vi...
tedious, so I decided to build a Telegram Bot to automate this! **Codeforces
DailyTracker Bot, **Codeforces Daily Tracker Bot** You can try it here:
https://t.me/Codeforces_tracking_bot
29.
Codeforces Progress Tracker Extension — Spreadsheet Hello,
I've developed a browser extension that tracks the total time you spend on a problem and updates a Google Sheet or local storage with details such as Problem Name, Rating, Tags, Time Taken, Link to Submission, and Remarks.
This extension places a timer at the top of the problem page, which starts when the user first clicks on the problem. A popup is displayed when a solution is accepted, allowing the user to add a remark.
### Installation
1. **Download**: Visit the [GitHub Link](https://github.com/JagnathReddy/Codeforces-Progress-Tracker) and download the ZIP file.
2. **Extract**: Unzip the file to a permanent location on your computer.
3. **Extensions Page**: Open `chrome://extensions/` for Chrome or `Settings and more (…) > Extensions` for Edge.
4. **Developer Mode**: Enable “Developer mode” at the top right.
5. **Load Extension**: Click “Load unpacked” and select the extracted folder.
After loading, you can use the extension without attaching a Google Shee...
Codeforces Progress Tracker Extension — Spreadsheet, Link](https://github.com/JagnathReddy/Codeforces-Progress-Tracker) and
download the ZIP file. 2, -Tracker) and download the ZIP file. 2. **Extract**: Unzip the file to a
permanent location on your
30.
Submity 2.0: The Ultimate Codeforces Submission Extension (Now with Firefox
Support & Live Tracker!)
Submity 2.0: The Ultimate Codeforces Submission Extension (Now with Firefox Support & Live Tracker!) Hello Codeforces community!
Yesterday, I shared the initial version of Submity (a fork of the original extension) to help make submitting solutions faster. Since then, I've received amazing feedback, faced some critical bugs through github collaboration.
Today, I am super excited to announce a massive, highly stable update that completely transforms the UX of the extension.
# What is Submity?
Submity adds a Submit option directly beside each problem description. You can paste your code and submit it without ever leaving the problem page.
# What's New in this Update?
Live Verdict Tracker: No need to refresh the page or visit the "My Submissions" tab. Track your submission status (Testing, Accepted , Wrong Answer) live, directly beneath the submit button!
Zero Page Reloads: Submissions now happen seamlessly in the background via a hidden iframe. You stay 100% focused on the problem.
Cross-Browser Support (Firefox & Zen!): The extension now fully supports Firefox a...
Submity 2.0: The Ultimate Codeforces Submission Extension (Now with Firefox
Support & LiveTracker!), Verdict Tracker: No need to refresh the page or visit the "My Submissions"
tab. Track your submission, Live Verdict Tracker: No need to refresh the page or visit the "My Submissions"
tab. Track your
31.
CSES Pro: Collapsible Progress Dashboard, Codeforces-style Copy/Paste & Star Bookmarks Hello Codeforces Community!
The CSES Problemset (cses.fi) is widely considered one of the best platforms for mastering core algorithms and data structures. However, compared to platforms like Codeforces, it lacks a few quality-of-life features that can make your practice workflow much smoother.
Specifically:
1. You have to save your code to a file locally just to upload and submit it.
2. There are no copy buttons on the input/output sample test cases.
3. There is no built-in way to bookmark/star tasks you want to review later.
4. There is no dynamic category-wise progress tracker, solve streak counter, or random problem selector.
To solve these annoyances, I built CSES Pro -- a lightweight, completely free, and open-source Chrome Extension that injects these features directly into the native CSES site.
---
## Feature Showcase
### 1. Codeforces-Style Submit Editor
No more saving temporary .cpp or .py files on your desktop just to upload them. The extension repl...
bookmark/star tasks you want to review later. 4. There is no dynamic
category-wise progresstracker, you want to review later. 4. There is no dynamic category-wise progress tracker
, solve streak
32.
Codeforces Problem Tracker Chrome Extension Hey guys! Many a times it so happens that you may know the solution to a problem or you may have read the tutorial and understood the solution but are just too lazy to implement it, and want to implement it later.
So to solve this problem I have created a simple chrome extension which helps you to keep track of your understood but not yet implemented problems. It marks those problems as yellow in the problemset page,contest dashboard and gym dashboard page.
Hope you find this useful.
https://chrome.google.com/webstore/detail/codeforces-problem-tracke/mopegdapkaknnngnandcpimkoimcoioc?utm_source=chrome-ntp-icon&authuser=1
<a href="https://www.imageupload.net/image/VWpQk"><img src="https://www.imageupload.net/upload-image/2020/01/20/Screenshot-from-2020-01-20-11-15-49.md.png" alt="Screenshot-from-2020-01-20-11-15-49.png" border="0" /></a>
<a href="https://www.imageupload.net/image/VWmMO"><img src="https://www.imageupload.net/upload-image/2020/01/20/Screenshot-from-2020-01-2...
Codeforces Problem Tracker Chrome Extension
33.
CP-Vertex — 1v1 Duels and Weakness-Oriented Training Hi everyone!
Over the past few months I've been building **CP-Vertex**, a training platform designed around one simple idea:
> Most tools can tell you **what your weaknesses are**. Very few tell you **what to practice next.**
The goal of CP-Vertex is to bridge that gap.
Website:
https://cpvertex.vercel.app/
Source Code:
https://github.com/aristoncodes/CP-Vertex
---
## The Training Loop
Instead of randomly picking problems, CP-Vertex follows a simple workflow:
> **Analyze your profile → Identify weak topics → Practice them → Test yourself in a duel → Upsolve missed problems → Repeat**
The focus is on helping you improve the topics that actually limit your progress.
---
## 1v1 Duels
Challenge another programmer to a live duel.
Problems are automatically selected around both players' ratings, making matches competitive rather than one-sided.
Features:
* Automatic problem selection
* Live progress updates
* Spectator mode
* Server-side d...
above your current level. * **Upsolve Tracker** — Automatically queues
unsolved contest problems so
34.
C2 Seating Arrangement (Hard) — O(n) Greedy with Floating Ambiverts [Codeforces Round 1101 Div. 2] Introduction
================
The editorial for this problem offers two approaches: a min/max table range tracker and a binary-search-over-ambiverts solution. This blog presents a third, independently derived O(n) greedy that feels more intuitive — at least to me. The central idea is tracking floating ambiverts: ambiverts who sat down in an already-occupied table but haven't been committed to a specific role yet, and can retroactively "become" introverts to rescue a future extrovert.
Key observation
===============
An extrovert needs a non-empty table. An introvert needs a completely empty table. An ambivert can do either. The tricky part is the order of decisions: we can't look ahead, so we must make lazy commitments.
Core insight
============
When an ambivert sits at an already-occupied table (acting like an extrovert), we don't need to commit them yet. If a later extrovert arrives with no free seat, we can retroactively declare one of those ambiverts an introvert — openi...
table range tracker and a binary-search-over-ambiverts solution. This blog
presents a third
35.
caide is like chelper but for C++, C#, Visual Studio, Codelite and other IDEs/languages **tl;dr:** Install [VsCaide](https://visualstudiogallery.msdn.microsoft.com/4fa8cbb8-abb3-4bc6-97c8-6dd25a3a3c74?SRC=Home) extension in extensions manager of Visual Studio 2013.
(NOTE: it's recommended to create caide project from scratch after update: use `caide init` from command line or "Create caide solution" button in Visual Studio.)
**v1.2.1:**
* Fix Codeforces contest parser, GCJ, HackerRank
* Support RCC contests, POJ
* C++ inliner: don't remove used typedefs defined at class scope.
**v1.2:**
* Fix Codeforces parser in russian interface
* C++: Remove inactive preprocessor blocks, unused macros, unused typedefs
* C# support in VS plugin
* Compatibility with CHelper extension (command line only)
* Support Google Code Jam, Russian Code Cup, HackerRank
Currently supported online judges: Codeforces, GCJ, CodeChef, Timus, HackerRank, POJ, RCC. (Topcoder is planned.)
Currently supported IDEs: Visual Studio 2013, CodeLite.
Currently supported programming langu...
only C++ programming language. Documentation, issue tracker and code:
https://github.com
36.
Most underrated extensions Hey Everyone!
Hope you all would be doing great! I recently was exploring some codeforces chrome extensions and I came across following underrated extensions which are not that famous but they are pretty much useful.
- [Coding Shout](https://chrome.google.com/webstore/detail/coding-shout/nggokghmfinpljihgjkkbogpgbbjjjme/related) (It gives a message stating verdict of your current submission)
_it's pretty much useful as during a contest we usually don't want to stay on 'my submission page' to get the verdict._
- [CF GetRating](https://chrome.google.com/webstore/detail/cf-getrating/amnjdhcbnpchmbggnfachokcjiidcpkc) (It hides the tags and shows only the problem difficulty)
_it's pretty much useful during practice as we don't want to see the tags but want to get an idea of problem difficulty._
- [CF Tracker](https://chrome.google.com/webstore/detail/cf-tracker/hadiffebpglmdnknojeoelfgmjleiecc) (It's a kind of stopwatch which may help in practice to speed ...
37.
Codeforces Practice Tracker – Blocked on Chrome Web Store, but open-source version available The extension [Codeforces Practice Tracker](https://chromewebstore.google.com/detail/codeforces-practice-track/cnahgdhboflcnojgmeehhhfeoojifonm) is currently blocked from the Chrome Web Store.
I have made a remixed version with the same features.
You can download the source code [here](https://github.com/nhan0123456/codeforces-practice-tracker-remix-by-nhan0123456).
How to install manually on Chrome:
Download and unzip the source code.
Open [chrome://extensions/](chrome://extensions/).
Enable Developer mode.
Click Load unpacked and select the folder of the extension.
Codeforces Practice Tracker – Blocked on Chrome Web Store, but open-source
version available, The extension [Codeforces Practice Tracker
](https://chromewebstore.google.com/detail/codeforces, ](https://github.com/nhan0123456/codeforces-practice-tracker
-remix-by-nhan0123456).
38.
Introducing Codeforces Tracker! Hey Codeforces!
I'm excited to share a project that I've been working on:
[CodeforcesTracker.com](http://codeforcestracker.com)
Codeforces Tracker is a free web tool that helps you analyze strengths and weaknesses with statistical data.
You can enter your Codeforces handle and instantly see:
- Common tags you find easy/challenging
- Topics you often struggle with
- Rating trends over time
- Breakdown of your general Codeforces statistics
- Problem recommendations picked personally for you
Everything is based on the Codeforces API, so no login is needed (thank you [user:MikeMirzayanov,2025-07-04]!)
Please note that statistics will not be accurate with a low number of problems/contests on your profile.
I initially built this tool to improve myself, but I hope that others may find it useful as well.
Would appreciate any feedback or suggestions.
Introducing Codeforces Tracker!, : [CodeforcesTracker.com](http://codeforcestracker.com) Codeforces Tracker is a
free web tool that helps you analyze, Codeforces Tracker is a free web tool that helps you analyze strengths and
weaknesses with
39.
Codeforces Tracker "MyCF" "[My Codeforces](https://my-cf-tracker.netlify.app/)" a Codeorces tracker web application
----------------------------------------------------
#### Some features:
- It can show your codeforces stats.
- You can solve problems by index, rating or contests. (Codeforces allows you to solve problems by rating not index)
- It can remember your handle implemented using local-storage.
- You can sync your handle with the solved problems.
- It can show the list of all upcoming contests.
_**Link: [MyCF](https://my-cf-tracker.netlify.app/)**_
Codeforces Tracker "MyCF", "[My Codeforces](https://my-cf-tracker.netlify.app/)" a Codeorces tracker web
application
40.
Codeforces Solve Tracker Hello, I have created [LETSCODE](https://letscoders.netlify.app/login) site, which can be helpful for some for tracking contest solves. You can also filter by ID like div. 1/div. 2/Div.3/Div.4 or whether you solved problems from the contest or not. Additionally, you can browse the problems list. Not Only CodeForces you can also track LeetCode and Atcoder Problems also In this Site. You can also Solve Problems From this site.
Access coding problems from **Codeforces**, **LeetCode**, and **AtCoder** all in **one** place.
But To use this website you **must** have Registered on **Codeforces** but remaining websites like Leetcode and Atcoder are optional.
[Source Code](https://github.com/sasidharmsr/LetsCode)
[Website Link](https://letscoders.netlify.app)
[Website Showcase](https://note-taking-app-liart.vercel.app/preview/3ngsvkzwfjr4axenbtxc12pt9k7zhw0)
To test You can Login above site using userId:- **test** and Password:- **1234**
, an extension for vscode I started coding [half a year ago](https://github.com/mfornet/acmx/commit/04fcad8f309730644c5ba90956ee3917406b47e3) for myself. Since then it has evolved a lot and it has some features that might be useful for some of you:
- Contest/Problem parsing. (Via [Competitive-Companion](https://github.com/mfornet/acmx/wiki#competitive-companion) extension).
- Running solution against testcases.
- Automatic verdict results (OK, WA, RTE, TLE, CE).
- Manage test cases easily.
- Stress solution.
- Support for multiple languages.
- Smart copy (Use custom algorithm library and merge code with [caide-cpp-inliner](https://github.com/slycelote/caide-cpp-inliner)).
Check [the wiki](https://github.com/mfornet/acmx/wiki) to read about all features.
## Installation
In the [vscode](https://code.visualstudio.com/download) install the extension from the [marketplace](https://marke...
. ## Discussion All the discussion happens in the [github issue tracker
](https://github.com/mfornet
42.
NO MORE TAB SHIFTS IN CONTESTS!!! Submit and Track Verdicts on Problem Page! Submity is a lightweight browser extension for Chromium and Firefox-based browsers that makes submitting solutions on Codeforces faster and more convenient.
What it does
Submity adds a Submit option directly beside each problem on Codeforces. This allows you to submit your solution directly from the problem page, without opening the separate Submit page and selecting the problem manually.
✨ New Features in this Fork (v2.0)
Live Verdict Tracker: No need to refresh or visit the submissions page! Track your submission status (Testing, Accepted, Wrong Answer) live, directly beneath the submit button.
Stay on Page: Submitting code no longer opens a new tab. A hidden iframe ensures you stay focused on the problem page while the code is processed securely in the background.
Clean UI: Professional, distraction-free status updates with proper color coding and no unnecessary loading spinners.
Cross-Browser Support: Now fully supports Firefox and Firefox-based browsers (like Ze...
. ✨ New Features in this Fork (v2.0) Live Verdict Tracker: No need to refresh
or visit the
43.
Severe bug in g++ optimizator (-O2) Hi!
I think everybody can remember a case when
Probably everyone remembers in practice a case when after implementation of correct algorithm you receive Wrong Answer. In such a situation, sometimes works: to send solution on another compiler.
[user:Gerald,2014-04-05] and [user:Nerevar,2014-04-05] have found severe bug, which gives one more argument to use the rule above.
Look closely, now it will be a miracle! [cut]
~~~~~
#include <cstdlib>
#include <iostream>
#include <cstdio>
using namespace std;
int main() {
int n;
cin >> n;
for (int x = 0; x <= n; x++) {
if (n == x + (x + 1) + (x + 2)) {
cout << x + 2 << " " << x + 1 << " " << x << endl;
exit(0);
}
}
cout << -1 << endl;
return 0;
}
~~~~~
Compile it with -O2: `g++ -O2 -o a a.cpp`
Run and enter `9`, you will see `-1`.
You can try without -O2 or using other compiler, you will get correct answer `4 3 2`.
For sur...
sure, I've submitted [the bug into gnu gcc tracker
](http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60766
44.
Collection of all [Codeforces] Related website **Website Based on codeforces (By users)**
- [CF-predictor](https://cf-predictor-frontend.herokuapp.com/)
- [Codehunt](https://codehunt.cc/)
- [Contest-mania](https://contestmania.web.app/)
- [Codedigger](http://codedigger.tech/practice/general/)
- [Algoshots](http://algoshots.herokuapp.com/)
- [By-User](http://rudradesai.in/cfviewer/)
- [Codedrills](https://recommender.codedrills.io/)
- [Codeforces-Visualizer](https://cfviz.netlify.app/)
- [Compare(Cf statistics)](https://cfstatistics.herokuapp.com/)
- [Codeforced](http://codeforced.github.io/handle/)
- [Upsolver](http://upsolve.rf.gd/)
- [Competitive](https://competitive.herokuapp.com/)
- [GYM-Solver](https://cp.fayox.com/#/)
- [Comments-Finder](https://igorjan94.konekon.ru/index/comments)
- [Extension(Practice tracker)](https://chrome.google.com/webstore/detail/codeforces-practice-track/cnahgdhboflcnojgmeehhhfeoojifonm)
- [Upsolver](https://codeforces-upsolving-helper.herokuapp.com/)
- [Workspace](http://wkspace.h...
.konekon.ru/index/comments) - [Extension(Practice tracker
)](https://chrome.google.com/webstore/detail, /#/) - [Comments-Finder](https://igorjan94.konekon.ru/index/comments) -
[Extension(Practicetracker
45.
ACM-ICPC 2011 World Finals: Let's go! <p>Today Saratov delegation will go to the championship's finals. As you remember, we've been planning to go to Sharm El-Sheikh since January, watching their great February revolution anxiously. As a result, the finals were moved to Orlando (Florida, USA). Our delegation got a little smaller too, as May is a hot month and it's a long way from Russia to the USA.</p><p>Our team is famous on Codeforces. And that's not surprising! Just look at them:</p><img src="http://assets.codeforces.com/images/saratov-su2-1.jpg" style="width:440px;float:right;margin:1em 4em 1em 1em;">
<ul>
<li>Maxim Ivanov (<span class="Apple-style-span" style="border-collapse: collapse; font-family: verdana, arial, sans-serif; font-size: 13px; "><a href="http://codeforces.me/profile/e-maxx" title="Полковник e-maxx" class="rated-user user-red" style="font-family: arial; text-decoration: none !important; font-weight: bold; color: rgb(0, 0, 204); ">e-maxx</a></span>) spends considerable time among the top rated users...
filer in gcc issue tracker and an author of some contests. Maxim is on the
fifth year in SSU Mechanics, tracker and an author of some contests. Maxim is on the fifth year in SSU
Mechanics and Mathematics
46.
New API endpoint just dropped <div style="text-align: center;">
<img src="/predownloaded/a0/16/a016754902c9cc770b0222d6d1fe251cbf729fb2.png" alt="Description" style="display: inline-block; max-width: 100%; height: auto;">
</div>
## TL;DR
- **LeekCF-Hinter** is a free, open-source (Apache-2.0) public API. `GET /v1/problems/{contestId}/{index}/hints` returns **2 to 5 graded hints** for a Codeforces problem: a small nudge first, the full solution last. No key, no account. **Check it out: https://leekcf-hinter-api.leekcf.workers.dev .**
- **Any extension, app, bot or person can use it.** It is a plain public API with open CORS, so a browser extension can call it directly.
- **LeekCF-Ratings already uses it today.** Install the extension ([Chrome](https://chromewebstore.google.com/detail/leekcf-rating/fnkoldggbbjmndapidpegfpkkokboklp) or [Firefox](https://addons.mozilla.org/en-US/firefox/addon/leekcf-rating)), open a problem and click **Show Hints**. You can watch the requests yourself in DevTools.
- **6,833 ...
own "Show Hints" button, a Discord bot, a VS Code sidebar, a practice tracker.
If you do, I would
47.
Codeforces Div2 2025 A/B/C Practice Sheet(includes most recent problems) Hello everyone ,
I built a small web-based practice sheet for Codeforces Div2 problems of **2025** that might be useful for people who like structured practice (A2OJ-style).
What it does:
- Contains **all Div2 A / B / C problems from 2025**
- Problems are separated into **Div2 A, Div2 B, Div2 C sheets**
- Ordered by **rating**
- You just enter your **Codeforces handle**
- Solved problems are **automatically highlighted**
- No login, no ads, no backend
Why I built this:
I wanted a **stable sheet** that:
- Doesn’t change over time
- Lets me track progress easily
- Works directly with the CF API
Link:
https://cf-div2-2025-tracker.vercel.app/
Source code (open-source):
https://github.com/sam170203/cf-div2-2025-tracker
If you find it useful or have suggestions, feel free to comment.
Hope it helps someone in their Div2 practice
Good luck and happy coding!
-source): https://github.com/sam170203/cf-div2-2025-tracker If you find it
useful or have, Source code (open-source): https://github.com/sam170203/cf-div2-2025-tracker
48.
Built a website that forces you to practice what you're actually bad at, not what's comfortable Hey guys, I want to share something I've been building.
I'm a 2nd year student, and I practice on Codeforces, LeetCode, and CodeChef. For a while I kept running into the same annoying problem — my progress was scattered across three tabs, three different rating systems, three different "weak topics," and I had no single place to actually see how I was doing or what I should practice next.
So over the past few months I built CPPro to fix that for myself, and figured some of you might find it useful too.
**What it actually does**
It's a single platform that pulls your CF + LC + CodeChef data together — ratings, heatmap, contest history, topic-wise solve counts. Nothing groundbreaking on its own, I know there are tools that already do parts of this.
The part that's actually different from most trackers is the daily problem system. Instead of generic "problem of the day" picks, it looks at your actual solve history across all three platforms and gives you two problems every ...
49.
The First Training on Codeforces::Gym <p>Today we open a new project <a href="http://codeforces.me/blog/entry/3676" style="color: rgb(0,0,204);">Codeforces::Gym</a>, it will be started on January 19, 08:00AM. 30 minutes later, оn <a href="http://timeanddate.com/worldclock/fixedtime.html?day=19&month=1&year=2012&hour=12&min=30&sec=0&p1=166" style="color: rgb(0,0,204);">Thursday, January, 19, 2012 08:30 (UTC)</a> the testing training contest will be started. The duration of the training is 3 hours. We invite you to join us! As all the trainings in Codeforces::Gym it will be held according ACM-ICPC rules.</p><p>As it will be a training, we will use problems from some programming contest (thank you, authors!). Please do not take part in the training, if you've seen these problems. Do not spoil training to other members. Thank you for your understanding.</p><p>Please use <a href="http://codeforces.me/blog/entry/3705">the official project tracker</a> to report about bugs and feature requests.</p>
Please use the official project tracker <http://codeforces.me/blog/entry/3705>
to
, /blog/entry/3705">the official project tracker to report about bugs and feature
requests.
50.
Stop Tab-Switching: Real-Time Audio Verdict Announcer & Advanced Analytics Dashboard Hello Codeforces!
During high-profile contests (like typical Div. 2 or Div. 3 or Div. 4 rounds) where tens of thousands of participants are competing simultaneously, the judge queue often gets heavily congested. We’ve all been there: you submit a solution, and then you find yourself repeatedly smashing F5 or constantly switching tabs between your IDE and the status queue just to check if your solution passed or got a dreaded TLE/WA.
Every time you switch tabs, you lose deep logical concentration, waste critical seconds, and risk racking up heavy time-decay penalties.
To solve this, I built CP-Monitor — a lightweight, real-time performance dashboard and verdict announcer designed to keep your focus exactly where it matters: inside the problem.
=> What it does
CP-Monitor connects directly to live platform queues to track your submissions. The moment the judge processes your code, it automatically broadcasts the result:
Immediate Voice Announcements: It reads your submissi...
) Rate Tracker: Instantly exposes your exact historical failure percentage
(e.g., tracking a 47.86% WA
51.
Codeforces extensions you would want to have CF Analytics: https://chromewebstore.google.com/detail/cf-analytics/hhljbjodjdbjbggddjaidojnlmaobcpo
CF World Standings: https://chromewebstore.google.com/detail/cf-world-standings/caginmipmmelcmijagfppgdljepiioak
CF-predictor: https://chromewebstore.google.com/detail/cf-predictor/ocfloejijfhhkkdmheodbaanephbnfhn
Codeforces Calender: https://chromewebstore.google.com/detail/codeforces-calendar/ehmnahdmmiibcbebjafdgjlomhnommpo
Codeforces Practice Tracker: https://chromewebstore.google.com/detail/codeforces-practice-track/cnahgdhboflcnojgmeehhhfeoojifonm
Codeforces Customizer: https://chromewebstore.google.com/detail/codeforces-customizer/akmlgflgekmnameijijkefhochekjfgg
Codeforces Better Comments: https://chromewebstore.google.com/detail/codeforces-better-comment/dmkcpaljgkhdcachgfmplaoldejhafgn
Carrot: https://chromewebstore.google.com/detail/carrot/gakohpplicjdhhfllilcjpfildodfnnn
-calendar/ehmnahdmmiibcbebjafdgjlomhnommpo Codeforces Practice Tracker: https, Codeforces Practice Tracker:
https://chromewebstore.google.com/detail/codeforces-practice-track
52.
Codeforces bug with reporting compilation error of Java programs (I don't know whether there is an official bug tracker, so sorry for making it a blog post.)
Submission [submission:3748858] is reported as runtime error, while it should be compilation error.
(I don't know whether there is an official bug tracker, so sorry for making it
a blog post
53.
How I organize my competitive programming solutions Today, I decided to share my repository of my source codes on OJs — where I store and arrange my solutions: **[CP-Archive](https://github.com/TomDevX/CP-Archive/tree/main)**.
**Disclaimer:** This is a personal progress tracker, not a formal encyclopedia. Read at your own risk!
### Quick Links:
- [My whole library](https://github.com/TomDevX/CP-Archive/tree/main/Solutions)
- [My Codeforces Archive](https://github.com/TomDevX/CP-Archive/blob/main/Solutions/Codeforces/README.md)
:** This is a personal progress tracker, not a formal encyclopedia. Read at
your own risk! ### Quick
54.
Built An Android App to track All CP/DSA Contests in one Place and Get Notified. [No ads & Free] I kept missing Codeforces rounds and LeetCode contests because I'd forget to check the schedule.
So I built **Contestify** — a free contest tracker app that aggregates all upcoming competitive programming contests in one place.
[Click Here to Install the Application](https://play.google.com/store/apps/details?id=com.netcode.contestify)
# Platforms covered
LeetCode, Codeforces, CodeChef, AtCoder, HackerRank, HackerEarth, TopCoder, GeeksForGeeks, Kaggle, ICPC, and more.
# Features
* Smart notifications (24h before + 1h before each contest)
* Filter only the platforms you follow
* Live countdown timers for ongoing contests
* One-tap join for any contest
* Share contests with friends
# Why I built this
I wanted a simple, no-noise way to stay consistent with contests without manually checking multiple sites.
# Pricing
* No account required
* Completely free
* No ads
I'd really a...
. So I built **Contestify** — a free contest tracker app that aggregates all
upcoming competitive
55.
Faceit on codeforces? recently i've been thinking, what if codeforces had something like faceit? so with assistance of Claude AI, i went ahead and built:
[CFSTATS:](https://mirasruslanjr.github.io/cfstats/)
==================
it shows all your stats and progress: rating history, problem breakdowns, activity heatmap and stuff like that. code is open source on github if you wanna check it out
**also just to be clear, it doesn't make matches like faceit does in cs2, it's purely a stats tracker ;)**
p.s.: i didn't do anythin bc i am a vibe-coder :O
tracker ;)**
56.
Sans Assistant v2.0: Destroying Newbie Excuses Since Today Hi Codeforces!
As many of you from my country know, 11th grade has officially come to an end, and we just had our Last Bell ceremony. For me, this means it's time to say goodbye to the Republic National Olympiad (RFO/RIO) ecosystem and shift my sights entirely to higher-level grinds like EJOI and beyond. (Assuming I can actually handle that much pressure without my brain frying, haha ;_:)
I know that while I am writing this, some absolute legends from the 11th-grade community are out there securing their shiny gold medals that will be given by there school. Huge congrats to them!
However... my own Last Bell ceremony didn't go down anywhere near as well as I thought it would. To be honest, I'm pretty tilted. The organizers completely glanced over my track record--they didn't even mention that I made it to the Finals 3 times and won a medal! To make it worse, I didn't even get a basic certificate, while some people who didn't even place walk away with one?
Worst of all, they ...
tracker, and absolute excuse destroyer for newbies (including me!). Basic
knowledge about Sans
57.
EQ Technologic Interview Experience In this particular blog, I am going to share my interview Experience with EQ Technologic. It was in mid — June when I received a mail from the recruiter for the Software Developer Role, University Graduate (2022).
Day 1: Online Assessment
========================
I received a mail regarding the aptitude and coding round. The exam is divided into 2 sections.
Section 1: Aptitude
-------------------
Consists of 14 questions of Logical Reasoning. The total duration of this section was 14 minutes and I was able to attempt 11–12 questions. The level of Questions varies from Easy to Medium.
Section 2: Coding
-----------------
Consist of 2 questions Data structure & Algorithms. The total duration of this section was 60 minutes. The level of Questions varies from Cakewalk to Simple, took me 15 mins to code both the questions.
Day 2:
======
Round 1: TPS-1 (Technical Phone Screen-1)
-----------------------------------------
The interview was taken by one of the software develo...
:- [Attendance-Tracker](https://github.com/Yashdew/Attendance-Tracker)
([website](http
58.
Hand-Curated 800–1000 Problem Sheet for Div 3/4 Beginners Hey Codeforces,
One thing that confused me early on: CF problem ratings aren't assigned by setters — they're crowd-sourced from contest performance. A problem rated 900 might have been solved by fewer people than an 800 in the same round, just because it appeared later in the standings. This means the raw rating is sometimes a poor proxy for actual learning difficulty, especially for beginners.
For example, some 900-rated problems require a clean observation you either see or you don't, while certain 800s are just tedious implementation with no real insight. For someone grinding Div 3/4, blindly following rating order can be discouraging or just inefficient.
I put together a curated problem sheet with this in mind: 70 problems across the 800–1000 range, ordered by what I'd call learning difficulty rather than raw CF rating. Each problem has a note explaining why it's placed where it is, and a Div 3/Div 4 badge so you know what type of contest it came from.
## A preview
...
* There's a handle tracker: enter your CF handle and it auto-marks problems
you've already AC'd
59.
mBIT 2025 Editorial Thank you to everyone who competed in mBIT 2025! It was a record breaking year for us with 84 in-person participants and 135 online participants. We hoped you guys enjoyed it as much as we did.
We tried hard to make the problems fun and interesting for as wide of a skill gap as possible. In fact, this year's competition had an in-person team of middle schoolers that was unfamiliar with for loops, and an online team with all three participants in the top 15 in the world in codeforces. We are glad to contribute to all niches of the computer science community: beginner and advanced, local and global. Thank you all for your enthusiasm.
Congratulations to the winners:
**Online Advanced:**
- 1st place — HoMaMaOvo — Masaki Nishimoto, Riku Kawasaki, Yui Hosaka
- 2nd place — mathforcesbox — Brian Xue, Bing-Dong Liu, Alex Chen
- 3rd place — bluepuppygreenturtle — Rain Jiang, Kai Jiang
**Online Intermediate:**
- 1st place — NULP Lega...
banner as far left as possible (imagine incrementing a foosball score tracker
). The gaps in the
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