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Codeforces

Ch 126.8of 30 Coding Challenge Platforms
  1. 1Runs onAPI, Web
  2. 2CostsFree plan
  3. 3Primary usecontests
  4. 4Languages supportedC, C++, C#, D, Delphi, F#, Free Pascal, Go, Haskell, Java, JavaScript, Kotlin, Node.js, OCaml, PascalABC.NET, Perl, PHP, PyPy, Python, Ruby, Rust, Scala
  5. 5Solution explanationsYes
  6. 6Custom challengesYes
  7. 7Company assessmentsNo
7 lines stated Written from the maker's own pages: codeforces.com
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The Codeforces homepage

Overview

Codeforces is ranked #12 of 30 in coding challenge platforms on Specifiction. It runs on API, Web. There is a free plan.

Codeforces plans and pricing

All plans
Codeforces Free Contest participation is free and open to everybody codeforces.com · 29 Sept 2026

Compared on coding challenge platforms

Free plan
Yescodeforces.com
Primary use
contestscodeforces.com
Languages supported
C, C++, C#, D, Delphi, F#, Free Pascal, Go, Haskell, Java, JavaScript, Kotlin, Node.js, OCaml, PascalABC.NET, Perl, PHP, PyPy, Python, Ruby, Rust, Scalacodeforces.com
Solution explanations
Yescodeforces.com
Custom challenges
Yescodeforces.com
Company assessments
Nocodeforces.com

Facts

What it is
Codeforces is a programming-contest community and platform where contests are held regularly and ratings reflect participants’ skills.codeforces.com · 29 Sept 2026
Practice
Past contests are available for preparation, and the site says it is developing learning content and training features.codeforces.com · 29 Sept 2026
Contests
The site says it organizes approximately six contests each month and that participation is free and open to everybody.codeforces.com · 29 Sept 2026
Contest format
In Codeforces-rule contests, participants solve problems, receive points for solving quickly, and can test other contestants’ solutions with hacks.codeforces.com · 29 Sept 2026
Skill ratings
Contest ratings use a modification of the Elo rating system, and contestants are grouped into two divisions.codeforces.com · 29 Sept 2026
Online judge
Solutions are tested on prepared tests or tests suggested through participant hacks, and the system returns verdicts.codeforces.com · 29 Sept 2026
API
The API provides some Codeforces data as machine-readable JSON through HTTP requests.codeforces.com · 29 Sept 2026
API limit
The API allows at most one request every two seconds; faster requests receive a call-limit error.codeforces.com · 29 Sept 2026
API access
API methods can be requested anonymously for public data, while private user data requires an API key.codeforces.com · 29 Sept 2026
Privacy and data
The privacy policy lists cookies, usage data, location, email, names, date of birth, country, city, delivery address, password, and company name among data it may collect.codeforces.com · 29 Sept 2026
Security
The privacy policy says the data controller takes appropriate security measures to prevent unauthorized access, disclosure, modification, or destruction of data.codeforces.com · 29 Sept 2026
Account rules
The FAQ says users should not create more than one account and should use the password reminder system if they forget their password.codeforces.com · 29 Sept 2026

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Sources