BZOJ 2301: [HAOI2011]Problem b-CSDN博客

网站介绍:2301: [HAOI2011]Problem b思路:莫比乌斯反演+整除分块代码:#pragma GCC optimize(2)#pragma GCC optimize(3)#pragma GCC optimize(4)#include<bits/stdc++.h>using namespace std;#define y1 y11#define fi ...