please help on a graph problem

Правка en1, от Tornad0, 2017-03-23 05:09:06

http://acm.uestc.edu.cn/#/problem/show/1296

please help on a graph problem, thanks! I dont know from where to think about it.

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en1 Английский Tornad0 2017-03-23 05:09:06 158 Initial revision (published)