tj

---------------------------------------防透视-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

#include<bits/stdc++.h>
using namespace std;
int main(){
    int a;
    cin>>a;
    if(a%3==0)cout<<3<<" ";
    if(a%5==0)cout<<5<<" ";
    if(a%7==0)cout<<7<<" ";
    if(a%3!=0  &&  a%5!=0  && a%7!=0)cout<<"n";
}

看完了，点个关注被，实在不行，点个赞吧！！！