func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long int n;     cin >> n;     int event, police = 0, ans = 0;     for (int i = 0; i < n; i++) {       cin >> event;       if (event == -1) {         if (police == 0)           ans++;         else           police--;       } else         police += event;     }     cout << ans;   }   