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

int main(){
  int t;
  cin >> t;
  while (t--){
    int n, ok = 1;
    cin >> n;
    vector<int> a(n + 1);
    for (int i = 1; i <= n; i++) cin >> a[i];
    sort(a.begin(), a.end());
    for (int i = 1; i <= n; i++) if (a[i] != i) ok = 0;
    cout << (ok ? "YES" : "NO") << endl;
  }
}