摘要: 传送门 #include<bits/stdc++.h> using namespace std; #define ll long long #define ull unsigned long long #define db double #define N 1000100 #define jd (i 阅读全文
posted @ 2019-03-26 19:11 david_alwal 阅读(134) 评论(0) 推荐(0) 编辑