func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxx = 2e5 + 20, mod = 1e9 + 7;   int main() {     int t;     cin >> t;     while (t--) {       string s;       int n, sum = 0, ans = 0;       cin >> n >> s;       for (int i = 0; i < n; i++) {         if (s[i] ==  ( )           sum++;         else           sum--;         if (sum < 0) {           while (s[i] ==  ) ) {             ans++;             i++;           }           sum = 1;         }       }       cout << ans << endl;     }     return 0;   }   