| Tutorials |
| USACO Guide | A comprehensive guide for all levels of the USA Computing Olympiad (USACO) with tutorials, practice problems, and resources. |
| OI Wiki | A Chinese wiki for competitive programming, covering a wide range of topics and algorithms with explanations and examples. |
| CP Algorithms | A collection of algorithms and data structures with explanations, examples, and practice problems. |
| Problemsets |
| Codeforces | The largest competitive programming platform with a large collection of problems and contests. |
| AtCoder | A Japanese competitive programming platform that hosts regular contests and has a vast problem archive. |
| CSES Problem Set | A collection of educational competitive programming problems. |
| Kattis | An online judge with many past ICPC problems. |
| OI Checklist | A collection of past problems from high school informatics olympiads. |
| Project Euler | A collection of challenging competitive programming problems that are mathematical in nature. |
| Other Resources |
| ICPC Official Website | The official website of the International Collegiate Programming Contest. |
| CLIST | A platform that aggregates competitive programming contests and problems from various online judges. |
| LeetCode | Contains common coding interview problems. |
