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Top 23 C++ competitive-programming Projects
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cp-algorithms
Algorithm and data structure articles for https://cp-algorithms.com (based on http://e-maxx.ru)
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cpeditor
The IDE for competitive programming :tada: | Fetch, Code, Compile, Run, Check, Submit :rocket:
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LearnCPP
Learn Cpp from Beginner to Advanced ✅ Practice 🎯 Code 💻 Repeat 🔁 One step solution for c++ beginners and cp enthusiasts.
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leetcode-solutions
My solutions to Leetcode Problems: Categorized based on the data structures, algorithms, and tricks used to solve them. (by razimantv)
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code_problems
Code Problems from Coding Challenge Websites. The goal is to help them to improve their code skills and also studying for coding interviews.
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Crack-Your-Placement
🎯 Repo for placement-preparation, DSA, Problem-Solving, Competitive Programming, CS-Fundamentals
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Fork_CPP
This repository contain the C++ program from basic to advance. This repository will help you to prepare for the interview questions.
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cpstl
Copy and Paste standard library (CPSTL) is a repository with a collection of data structure and algorithms in many different languages
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ competitive-programming discussion
C++ competitive-programming related posts
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Popcount walks: next, previous, toward and nearest
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Neetcode 150
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a better way to read from a socket with unusual end-of-stream tokens
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Copy and Past library in c++
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Competitive Programming Is Useless
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[graph theory] Simple algorithm to solve k-cliques problem on graphs
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Contributing on Github using the Github website
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A note from our sponsor - Sevalla
sevalla.com | 1 Sep 2025
Index
What are some of the best open-source competitive-programming projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | cp-algorithms | 9,312 |
| 2 | kactl | 3,004 |
| 3 | ac-library | 2,116 |
| 4 | cpeditor | 1,993 |
| 5 | LearnCPP | 758 |
| 6 | algorithms | 556 |
| 7 | cpp-dump | 354 |
| 8 | leetcode-solutions | 147 |
| 9 | expressPython | 130 |
| 10 | code_problems | 56 |
| 11 | cp-tips | 41 |
| 12 | macOS-stdc.h | 41 |
| 13 | C-plus-plus-Algorithms | 34 |
| 14 | The-CP-Companion | 18 |
| 15 | Crack-Your-Placement | 18 |
| 16 | cpalgorithms | 17 |
| 17 | competitive-programming | 17 |
| 18 | Fork_CPP | 15 |
| 19 | callofcode | 14 |
| 20 | cpstl | 13 |
| 21 | umpire | 8 |
| 22 | Leetcode_Solutions | 8 |
| 23 | eth-algolab | 3 |
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