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```cpp 题目背景 深绘里一直很讨厌雨天。 灼热的天气穿透了前半个夏天，后来一场大雨和随之而来的洪水，浇灭了一切。 虽然深绘里家乡的小村落对洪水有着顽固的抵抗力，但也倒了几座老房子，几棵老树被连根拔起，以及田地里的粮食被弄得一片狼藉。 无奈的深绘里和村民们只好等待救济粮来维生。 不过救济粮的发放 阅读全文
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题面:https://www.luogu.org/problem/P4213 cpp include include include include include include include include include using namespace std; const int mod= 阅读全文
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```cpp Description 小 X 自幼就很喜欢数。但奇怪的是，他十分讨厌完全平方数。他觉得这些数看起来很令人难受。由此，他也讨厌所有是完全平方数的正整数倍的数。然而这丝毫不影响他对其他数的热爱。 这天是小X的生日，小 W 想送一个数给他作为生日礼物。当然他不能送一个小X讨厌的数。他列出了 阅读全文
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```cpp include include include include include include include include using namespace std; const int N=1000005; int n,m,root=1,cnt=1,lson[N],rson[N], 阅读全文
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```cpp include include include include include include include include using namespace std; const int M=5000005; int Cnt,n,m,sum[M 1; lc[t]=build(l,mi 阅读全文
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```cpp include include include include include include include include using namespace std; const int N=205; double x[N],sum[N=r){ cnt[i]+=v; pushup(i 阅读全文