/* -*- coding: utf-8 -*-
 *
 * 3611.cc:  No.3611 Omega Cat・・udging ver.・・- yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* constant */

const int MAX_N = 200000;

/* typedef */

/* global variables */

int hs[MAX_N];

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n;
    scanf("%d", &n);
    for (int i = 0; i < n; i++) scanf("%d", hs + i);

    int x = 0;
    while (x + 1 < n && hs[x] > hs[x + 1]) x++;
    if (x <= 0 || x >= n - 1) { puts("No"); continue; }

    int y = x;
    while (y + 1 < n && hs[y] < hs[y + 1]) y++;
    if (y <= x || y >= n - 1) { puts("No"); continue; }

    int z = y;
    while (z + 1 < n && hs[z] > hs[z + 1]) z++;
    if (z <= y || z >= n - 1) { puts("No"); continue; }

    int w = z;
    while (w + 1 < n && hs[w] < hs[w + 1]) w++;
    if (w != n - 1) { puts("No"); continue; }

    puts("Yes");
  }

  return 0;
}