func_code_string: #include <bits/stdc++.h>   using namespace std;   long long t, n, sum, t1, ans;   string st;   int main() {     cin >> t;     while (t--) {       cin >> n;       cin >> st;       int a = 0, b = 0;       for (int i = 0; i < n; i++) {         if (st[i] ==  ( ) a++;         if (st[i] ==  ) ) {           if (a)             a--;           else             b++;         }       }       cout << min(a, b) <<   n ;     }   }   