func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize(3)   using namespace std;   signed main() {     long long t;     cin >> t;     while (t--) {       long long n;       cin >> n;       string s;       cin >> s;       map<long long, long long> maps;       long long sum = 0;       for (auto &i : s) {         sum += i -  0  - 1;         maps[sum]++;       }       sum = 0;       long long ans = 0;       for (auto &i : s) {         ans += maps[sum];         sum += i -  0  - 1;         maps[sum]--;       }       cout << ans <<   n ;     }   }   