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

#include <bits/stdc++.h> using namespace std; int a; int main(){ cin>>a; if(a%30) cout<<"3"<<" "; if(a%50) cout<<"5"<<" "; if(a%7==0) cout<<"7"<<" "; else if(a%3!=0 && a%5!=0 && a%7!=0) cout<<"n"; return 0; }

using namespace std;
int main()
{
int n;
cin >> n;
if(n % 3 != 0&&n % 5 != 0&&n % 7 != 0)
{
cout << "n";
}
if(n % 3 == 0)
{
cout << 3 << " ";
}
if(n % 5 == 0)
{
cout << 5 << " ";
}
if(n % 7 == 0)
{
cout << 7 << " ";
}
return 0;
}

#include using namespace std; int main(){ int t; cin>>t; if(t%30&&t%50&&t%70){ cout<<"3 5 7"; }else if(t%30&&t%50){ cout<<"3 5"; }else if(t%30&&t%70){ cout<<"3 7"; }else if(t%50&&t%70){ cout<<"5 7"; }else if(t%30){ cout<<"3"; }else if(t%50){ cout<<"5"; }else if(t%70){ cout<<"7"; }else{ cout<<"n"; } return 0; } 这么做就可以了！