func_code_string: #include <bits/stdc++.h>   using namespace std;   long long t, n, m, k, x, y, z, a[500005], ans, val;   int main() {     ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);     cin >> n;     string s;     cin >> s;     for (long long i = 0; i < n; i++) {       if (s[i] ==  ( )         x++;       else         x--;       if (x == -1 && !z)         x = 0, z = 1;       else if (x == -1)         break;     }     if (x == z)       cout <<  YES ;     else       cout <<  NO ;     return 0;   }   