#include <bits/stdc++.h>
using namespace std;

#define int ll
#define fast_io cin.tie(0)->sync_with_stdio(0);
#define endl '\n'
typedef long long ll;

int32_t main() {
	fast_io;

	int t; cin >> t;
	while (t--) {
		int n; cin >> n;
		vector<int> a(n);
		for (auto &i : a) cin >> i;
		sort(a.rbegin(), a.rend());
		int mx = a[0];
		int s = accumulate(a.begin() + 1, a.end(), 0ll);
		cout << mx + max(mx, s) << endl;
	}
}