摘要: A:http://codeforces.com/contest/1443/problem/A 解析: 考虑从2*n开始,每次+2构造 #include<cstdio> #include<cstring> #include<vector> #include<set> #include<algorith 阅读全文
posted @ 2020-11-03 21:39 liyexin 阅读(109) 评论(0) 推荐(0)