摘要: 没打,简单补档 C.Edgy Trees 容斥,把黑边断掉数联通块,每个联通块贡献$siz^k$ 1 #include<cstdio> 2 #include<cstring> 3 #include<algorithm> 4 using namespace std; 5 const int N=200 阅读全文
posted @ 2019-03-22 11:03 Speranza_Leaf 阅读(366) 评论(2) 推荐(0)