#include<iostream>
using namespace std;
int main()
{
    int x;
    while(cin>>x)
    {
                 if(x<=2||x%3!=0&&x%5!=0&&x%7!=0&&x%11!=0)
                 cout<<"質數\n";
                 else
                 cout<<"非質數\n";
                 }
                 return 0;
                
                
                 }

 幫忙一下

哪裡錯了阿?