摘要: K #include <iostream> #include <cstdio> #include <vector> using namespace std; const int N = 2000010; int n, m, head[N], ver[N << 1], nex[N << 1], tot 阅读全文
posted @ 2022-07-12 00:31 duoluoluo 阅读(28) 评论(0) 推荐(0)