摘要: 传送门 A - The Number of Even Pairs #include <bits/stdc++.h> #define ll long long using namespace std; int main() { //freopen("in.txt","r",stdin); int n, 阅读全文
posted @ 2020-03-23 12:27 zdragon 阅读(312) 评论(0) 推荐(0) 编辑