func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int a, b, c, d, i, j = 1, k, l = 0, n, m, t, s = 0, p, r, ans,                                  w = 0, y, x, lcm, gcd, q, count;     string str;     vector<string> vc;     vector<string> vc2;     map<long long int, long long int> mp;     set<string> stringstream;     cin >> n >> m;     for (j = n + 1;; j++) {       l = 0;       for (i = 2; i <= sqrt(j); i++) {         if (j % i == 0) {           l = 1;           break;         }       }       if (l == 0) {         if (j == m)           cout <<  YES  << endl;         else           cout <<  NO  << endl;         return 0;       }     }     return 0;   }   