摘要：
问题 F: Icebergs 时间限制: 3 Sec 内存限制: 256 MB提交 状态 题目描述 Tania is a marine biologist. Her goal is to measure the impact of climate change on the population o 阅读全文
摘要：
1.单点修改，区间求和 #include<iostream> #include<algorithm> using namespace std; typedef long long ll; const int maxn=1e6+100; struct node{ int l,r; ll s; }tre 阅读全文