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Hi,
I have just watched a tutorial about "Bits". I need to solve some easy problems so I can increase my understanding for bits. I've noticed that many CF rounds involve bits problems, and I couldn't solve a single one during the rounds.
If you know some problem(s), please comment with them. Also, if I need to revise some topics, please comment with them too.
Thanks in advance.
A lot of problems with bits and bitsmask: http://codeforces.me/problemset/tags/bitmasks
Topcoder tutorials also have great resources with problems.