莫比乌斯反演笔记

minato_yukina 发布时间：2022-08-21 20:20:57 ，浏览量：2

对于一些函数,如果它本身的值难以求得,但对应约数容易求,那么可以考虑反演来简化运算. 本帖收录一些本人写过的反演题, 资料参考: OIWIKI 求解莫比乌斯函数的模板（利用线性筛）

int mu[maxn];int pr[maxn];ll sum[maxn];bool vis[maxn];
void getMu(int n){
	mu[1] = 1;int tot = 0;
	for(int i=2;ik;
		ll ans = 0;
		for(ll l=1,r=0;l


    
        
        
        
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