#include <bits/stdc++.h>   using namespace std;   const int N = 100010;   char s[N];   int main() {     int t;     scanf( %d , &t);     while (t--) {       map<long long, long long> mp;       long long n;       scanf( %lld , &n);       scanf( %s , s);       long long sum = 0, ans = 0;       long long x;       for (int i = 1; i <= n; i++) {         x = s[i - 1] -  0  - 1;         sum += x;         if (sum == 0) ans++;         ans += mp[sum];         mp[sum]++;       }       printf( %lld n , ans);     }     return 0;   }   