from sys import stdin
input = stdin.readline

def RLE(A):
    ans = []
    cnt = 0
    for i in range(len(A)):
        cnt += 1
        if i+1 == len(A) or A[i] != A[i+1]:
            ans.append((A[i], cnt))
            cnt = 0
    return ans

def RLER(A):
    ans = []
    for s, c in A:
        ans.append(s*c)
    return "".join(ans)

for _ in range(int(input())):
    N = int(input())
    H = list(map(int, input().split()))

    A = []
    for i in range(N-1):
        if H[i] < H[i+1]:
            A.append(0)
        else:
            A.append(1)
    R = [n for n, _ in RLE(A)]

    print("Yes" if R == [1, 0, 1, 0] else "No")