#include <bits/stdc++.h>
using namespace std;
const int N = 1e5;
int a[N + 2], p[N + 2];
void solve() {
  int n;
  cin >> n;
  for (int i = 1; i <= n; i++) {
    int x;
    cin >> x;
    a[x] = i, p[i] = 0;
  }
  p[n + 1] = 1;
  int nx = -1;
  for (int i = 1; i <= n; i++) {
    if (nx == -1) {
      p[a[i]] = 1;
      if (p[a[i] + 1] == 0) nx = a[i] + 1;
    } else {
      if (a[i] != nx) {
        cout << "NO\n";
        return;
      }
      nx++;
      if (p[nx]) nx = -1;
    }
  }
  cout << "YES\n";
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}
