#include <bits/stdc++.h>

#ifdef LOCAL
#include "../algo/debug.h"
#else 
#define debug(...) 0
#endif

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int tt;
  cin >> tt;
  while (tt--) {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
      cin >> a[i];
      a[i]--;
    }
    sort(a.begin(), a.end());
    int ans = 1;
    for (int i = 0; i < n; i++) {
      ans &= a[i] == i;
    }
    cout << (ans ? "YES" : "NO") << '\n';
  }
  return 0;
}