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  1. #include <bits/stdc++.h>
  2. #define MAMDOUH  ios::sync_with_stdio(false); cin.tie(NULL)
  3. #define ll long long
  4. #define dd double
  5. #define ld long double
  6. #define pi 3.14159265359
  7. #define ull unsigned long long
  8. #define yes cout<<"YES\n";
  9. #define no cout<<"NO\n";
  10. #define el "\n"
  11. using namespace std;
  12.  
  13.  
  14. void solve() {
  15.     ll n;
  16.     cin>>n;
  17.     if (n==0||n==1) {
  18.         no;
  19.     }
  20.     else {
  21.         for (ll i=2;i*i<=n;i++) {
  22.             if (n%i==0) {
  23.                 no;
  24.             }
  25.         }
  26.         yes;
  27.     }
  28.  
  29. }
  30.  
  31. int main()
  32. {
  33.     MAMDOUH;
  34.     solve();
  35.     return 0;
  36. }
Success #stdin #stdout 0.01s 5288KB
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NO
YES
https://ideone.com/PA83jR
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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