摘要: 1 #include<bits/stdc++.h> 2 using namespace std; 3 typedef long long ll; 4 const ll mod=1e9+7; 5 const int N=2e6+10; 6 ll c[N],b[N]; 7 ll n,k,a,ans; 8 阅读全文
posted @ 2019-07-28 18:33 Snow_in_winer 阅读(145) 评论(0) 推荐(0) 编辑