func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n, sum = 0;       long long ans = 0;       cin >> n;       char s[n];       cin >> (s + 1);       map<int, int> f;       f[0] = 1;       for (int i = 1; i <= n; i++) {         int tmp = s[i] -  0 ;         sum += tmp;         ans += f[sum - i];         f[sum - i]++;       }       cout << ans << endl;     }   }   