题解

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