#include <bits/stdc++.h>

#define int long long

using namespace std;


 void solve(){
    int n;
        cin >> n;
        vector<int> v(n);
        for(int i = 0; i < n; ++i){
            cin >> v[i];
        }
        int sum = 0, mx = 0, ans = 0;
        for(int i = 0; i < n; ++i){
            sum += v[i];
            mx = max(mx, v[i]);
            if( sum - 2 * mx == 0) ++ans;
        }
        cout << ans << '\n';
 }
signed main(){
    ios::sync_with_stdio(0),cin.tie(0), cout.tie(0);
    int t;
    cin >> t;
    while(t--){
        solve();
    }
}