If you don’t mind competitive programming sites then you can try codeforces [1] which is probably one of the hardest sites to compete in. You could also try cod

If you don’t mind competitive programming sites then you can try codeforces [1] which is probably one of the hardest sites to compete in. You could also try codechef [2] which has long challenges so you can compete over the span of a week rather than over two hours like on codeforces. [1] http://codeforces.com http://codeforces.com [2] https://www.codechef.com https://www.codechef.com