#include <bits/stdc++.h>

using namespace std;

const int N = 300005;
int n, a[N];

int main() {
  ios::sync_with_stdio(0), cin.tie(0);

  int t;
  cin >> t;
  while (t--) {
    cin >> n;
    for (int i = 1; i <= n; i++) {
      cin >> a[i];
    }
    sort(a + 1, a + n + 1);

    for (int i = n, s = 0; i != -1; i--) {
      s += a[i] != a[i + 1];
      if (s > i) {
        cout << n - i << '\n';
        break;
      }
    }
  }
}