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

#define FAST ios_base::sync_with_stdio(false);cin.tie(NULL);
using ll = long long;

int main() {
  FAST;
  
  int tc = 1, ti;
  cin >> tc;

  for (ti = 1; ti <= tc; ++ti) {
    ll n, i, x, sum, curr;
    cin >> n;

    vector<ll> a(n);
    for (i = 0; i < n; ++i) cin >> a[i];
    sort(a.begin(), a.end());
    sum = accumulate(a.begin(), a.end(), 0ll);

    x = 0;
    curr = 0;
    while (curr <= sum) {
      x += 1;
      curr += x;
    }

    cout << x << "\n";
  }

  return 0;
}