func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(NULL);     ;     int t, n;     string s, p;     cin >> t;     while (t--) {       cin >> n;       cin >> s;       for (int j = 0; j < (2 * n - 1); j += 2) {         cout << s[j];       }       cout <<   n ;     }   }   