#include <bits/stdc++.h>
template <class T>
inline void read(T &x) {
  x = 0;
  int f = 0;
  char ch = getchar();
  while (!isdigit(ch)) {
    f |= ch == '-';
    ch = getchar();
  }
  while (isdigit(ch)) {
    x = (x << 1) + (x << 3) + (ch ^ 48);
    ch = getchar();
  }
  x = f ? -x : x;
  return;
}
int p[100010], siz[100010], find[100010];
int t, n;
bool flag;
int main() {
  read(t);
  while (t--) {
    read(n);
    flag = true;
    for (int i = 1; i <= n; ++i) read(p[i]);
    for (int i = 2; i <= n; ++i) {
      if (p[i] - p[i - 1] > 1) {
        flag = false;
        break;
      }
    }
    puts(flag ? "Yes" : "No");
  }
  return 0;
}
