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

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(cin.failbit);

  int tt;
  cin >> tt;
  while(tt--) {
    int n;
    cin >> n;
    vi a(n);
    int64_t sum = 0;
    for (auto& x : a) cin >> x;
    sort(all(a));
    reverse(all(a));
    rep(i, 0, n) {
      sum += max(a[i] - i, 0);
    }
    cout << sum << '\n';
  }
}