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  1. #include <iostream>
  2. using namespace std;
  3.  bool prime(int n) {
  4.     if (n < 2) return false;
  5.     for (int x = 2; x*x <= n; x++) {
  6.         if (n%x == 0) return false;
  7.     }
  8.     return true;
  9. }
  10.  
  11. int main() {
  12.    int n;
  13.    cin>>n;
  14.    if(prime(n)){
  15.    	cout<<"YES";
  16.    }else{
  17.    	cout<<"NO";
  18.    }
  19. }
Success #stdin #stdout 0s 5320KB
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NO
https://ideone.com/Qdi0zs
language:
C++ (gcc 8.3)
created:
6 hours ago
visibility:
public

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