题解

#include<iostream>
using namespace std;
int main(){
int n;
cin>>n;
if(n%30){
cout<<"3"<<" ";
}
if(n%50){
cout<<"5"<<" ";
}
if(n%7==0){
cout<<"7"<<" ";
}
if(n%3!=0&&n%5!=0&&n%7!=0){
cout<<"n";
}
return 0;
}