func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n;     cin >> n;     long long coins = 0;     vector<long long> arr(n);     for (int i = 0; i < n; i++) cin >> arr[i];     int i = 0, j = 0;     while (i < n && j < n) {       while (i < n && arr[i] <= 0) i++;       while (j < n && (arr[j] >= 0 || j < i)) j++;       if (i >= n || j >= n) break;       long long x = min(abs(arr[i]), abs(arr[j]));       arr[i] -= x;       arr[j] += x;     }     for (int i = 0; i < n; i++) {       if (arr[i] > 0) coins += arr[i];     }     cout << coins <<   n ;   }   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int t;     cin >> t;     while (t--) {       solve();     }     return 0;   }   