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  1. #include <iostream>
  2. using namespace std;
  3. // PRIME NUMBER TEST//
  4. bool prime(int n)
  5. {
  6.     if(n<2)return false;
  7.     if(n<=3)return true;
  8.     if(n%2==0)return false;
  9.     for(int i=3;i*i<=n;i+=2)
  10.     {
  11.         if(n%i==0)return false;
  12.     }
  13.     return true;
  14. }
  15. int main() {
  16. int a;cin>>a;
  17. prime(a);
  18.  
  19. 	return 0;
  20. }
Success #stdin #stdout 0.01s 5520KB
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https://ideone.com/ozrn5j
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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