#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll inf=14449999999994;
ll mod=998244353 ;
int main(){
    ll t;
    cin >> t;
    for (ll i = 0; i < t; i++)
    {
        ll n;
        cin >> n;
        ll ans=0;
        for (ll j = 0; j < n; j++)
        {
            ll x;
            cin >> x;
            if (x==1)
            {
                ans+=1;
            }
        }
        cout << ans << endl;
    }
    
}