#include <bits/stdc++.h>
using namespace std;
int main() {
  int t, n;
  cin >> t;
  while (t--) {
    cin >> n;
    int a[n];
    for (int i = 0; i < n; i++) cin >> a[i];
    int flag = 0;
    for (long long i = 1; i < n; i++)
      if (a[i] - a[i - 1] > 1) flag = 1;
    if (flag == 1)
      cout << "No\n";
    else
      cout << "Yes\n";
  }
}
