
AtCoder
6.1#16 in coding challenge platformsFree planFree planWeb
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| Fact | AtCoder | HackerRank |
|---|---|---|
| Founded | 2012 | 2009 |
AtCoder suits people who want to practice programming problems or compete in browser-based contests. It may also suit users interested in ratings, employer applications through AtCoder Jobs or the PAST skills test.
You want what its maker publishes above — check its page for the details.