摘要: #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 5e5 + 9; ll n, m, root; ll a[N]; struct segmentTree { struct node { 阅读全文
posted @ 2021-04-21 13:09 u_yan 阅读(35) 评论(0) 推荐(0) 编辑