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Graphs "transformation" problems
Hi, everyone and I hope you are doing well!
Recently, I started to solve some graph problems like this:
https://codeforces.net/problemset/problem/1045/C https://codeforces.net/contest/231/problem/E
I'm trying to figure out if I need to learn something to handle this kind of problems, so I will glad if you can share with me problems like that and some tricks, thank you!
