#include <bits/stdc++.h>
#define ll long long
#define pub push_back
#define fast                      \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);
using namespace std;
void solve()
{
    ll n;
    cin >> n;
    ll s = 0;
    for (ll i = 1; i <= n; i++)
    {
        int x;
        cin >> x;
        s += x;
    }
    ll i;
    for (i = 1;; i++)
    {
        if (s >= i)
        {
            s -= i;
        }
        else
        {
            break;
        }
    }
    cout << i << endl;
}
int main()
{
    fast;
    ll t;
    cin >> t;
    while (t--)
    {
        solve();
    }
    return 0;
}