摘要: #include<cstdio> #include<algorithm> #include<iostream> using namespace std; const int maxn = 1e5 + 5; void build(int root, int a[], int sum[], int st 阅读全文
posted @ 2021-04-03 09:58 loliconsk 阅读(40) 评论(0) 推荐(0)