luogu 1414 又是毕业季II 约数相关

感觉好水呀~

Code: 

#include <cstdio>
#include <algorithm>
#define N 1000005  
#define setIO(s) freopen(s".in","r",stdin) 
using namespace std;
int sum[N],vis[N],Mx[N],val[N]; 
int main() 
{ 
    int i,j,n;
    // setIO("input");   
    scanf("%d",&n);
    for(i=1;i<=n;++i) scanf("%d",&val[i]),++vis[val[i]];
    for(i=1;i<N;++i) 
        for(j=i;j<N;j+=i) 
            sum[i]+=vis[j]; 
    for(i=1;i<N;++i) Mx[sum[i]]=max(Mx[sum[i]],i); 
    for(i=n-1;i>=1;--i) Mx[i]=max(Mx[i],Mx[i+1]); 
    for(i=1;i<=n;++i) 
    {
        printf("%d\n",Mx[i]); 
    }
    return 0;
}