func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m;     cin >> n >> m;     for (int i = n + 1; i <= m; i++) {       int count = 0;       for (int j = 2; j < i; j++) {         if (i % j == 0) count++;       }       if (count == 0) {         if (m == i) {           cout <<  YES  << endl;           return 0;         } else           break;       }     }     cout <<  NO  << endl;     return 0;   }   