| Name | Description |
|---|---|
| CP-Algorithms | E-Maxx Algorithms in English. |
| CodeForces Edu | Lessons prepared by teachers of ITMO University. |
| CodeChef | DSA Learning Series | CCDSAP Prepare | IOI Prepare | Programming Contest Syllabus |
| Topcoder Data Science Tutorials | A list of tutorials written by respected Topcoder members. Many top programmers started learning data sciences from here. |
| PEGWiki | A website with amazing in-depth wiki-like writeups on many topics. |
| Notes - HackerEarth | A great crowdsourcing platform for tutorials. Also visit Code Monk. |
| CommonLounge | Learn DSA | CP: From Beginner to Expert | IOI Training: Path to Gold |
| COPS IIT, BHU | Great resource! |
| AlgoWiki | A wiki dedicated to competitive programming, contains some standard techniques and related problems. |