#include <bits/stdc++.h>
using namespace std;
int main() {
	int tt;
	cin >> tt;
	while (tt--) {
		int n;
		cin >> n;
		vector<int> f(n);
		for (int i = 0; i < n; i++) {
			cin >> f[i];
		}
		int ans = 0;
		for (int i = 0; i < n; i++) {
			if (f[i] == 1) {
				ans++;
			}
		}
		cout << ans << endl;
	}
	return 0;
}