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featured
Codeforces
Competitive programming contests, a huge problemset, and a rating you can climb
4.7
FreeFree to compete; optional …
featured
AtCoder
Weekly programming contests from beginner to expert, with a public rating you can climb
4.7
FreeFree to compete; optional …
| Spec | Codeforces | AtCoder | LeetCode |
|---|---|---|---|
| Category | Education & Learning | Education & Learning | Education & Learning |
| Pricing | Free to compete; optional account | Free to compete; optional account | Free + Premium |
| Rating | 4.7 (24,000) | 4.7 (16,000) | 4.6 (92,000) |
| Community | 93/100 | 92/100 | 90/100 |
| Tier | featured | featured | featured |
| Best for | competitive-programming, contests, algorithms, practice | competitive-programming, contests, algorithms, practice | algorithms, interview, coding, practice |
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