「atcoder - agc032c」Three Circuits
link。首先这个图是一个欧拉图,所以所有度数都是偶数。然后证明一个重要的结论:当有一个结点的度数 >= 6 时一定可行。你考虑所有度数都是偶数,所以菊花图卡不掉,因此是对的。那么现在度数...
In mathematics you don't understand things, you just get used to them.
In mathematics you don't understand things, you just get used to them.