摘要: https://www.luogu.com.cn/blog/CJL/solution-p4313 #include<iostream> #include<cstring> using namespace std; const int N=400020; #define int long long c 阅读全文
posted @ 2020-10-27 21:41 晴屿 阅读(105) 评论(0) 推荐(0) 编辑