超超超简单的题解

保过

#include <iostream>
using namespace std;
int main(){
    int n;
    cin >> n;
    bool flag = true;
    if(n % 3 == 0){
        cout << 3 << " ";
        flag = false;
    }if(n % 5 == 0){
        cout << 5 << " ";
        flag = false;
    }if(n % 7 == 0){
        cout << 7 << " ";
        flag = false;
    }if(flag == true){
        cout << 'n';
    }
}