开荒？

#include<iostream>
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";
}