func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     for (int itr = 0; itr < t; itr++) {       int n;       vector<int> s;       cin >> n;       for (int i = 1; i <= n; i++) {         int tmp;         cin >> tmp;         s.push_back(tmp);       }       int token = 0;       for (int i = 0; i < s.size(); i++) {         int flag = 0;         for (int j = 2; j <= 2 + i; j++) {           if (s[i] % j != 0) {             flag = 1;             break;           }         }         if (flag == 0) {           token = 1;           break;         }       }       if (token == 1)         cout <<  NO n ;       else         cout <<  YES n ;     }   }   