func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     long long n;     cin >> n;     vector<long long> left;     vector<long long> right;     long long ok = 0;     for (long long i = 0; i < n; i++) {       string s;       cin >> s;       long long l = 0, r = 0;       for (auto it : s) {         if (it ==  ( ) {           l++;         } else if (it ==  )  && l != 0) {           l--;         } else {           r++;         }       }       if (r == 0 && l != 0) {         left.push_back(l);       }       if (r != 0 && l == 0) {         right.push_back(r);       }       if (r == 0 && l == 0) {         ok++;       }     }     sort(left.begin(), left.end());     sort(right.begin(), right.end());     long long r = 0;     long long ans = 0;     for (long long l = 0; l < left.size(); l++) {       long long cur = left[l];       while (r < right.size() && right[r] < cur) {         r++;       }       if (r < right.size() && right[r] == cur) {         r++;         ans++;       }       if (r == right.size()) break;     }     ans += ok / 2;     cout << ans << endl;   }   