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Good web site/GitHub repo for practice

Hi everyone,

I'm looking for one good web site with coding exercises for practice c++.

Ofc I know that Leetcode/Codeforces is good but I'm looking for web sites where I can practice all topics of c++ from OOP to concurrent and parallel programming.

Good thing will be if you know for some sites where you get code snippet and then need to predict output/what is error.

https://redd.it/1v2idr3
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