文件目录

#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';
    }
    return 0;
}