T = int(input())

for _ in [0] * T:
    N = int(input())
    H = list(map(int, input().split()))
    L = []

    for i in range(N - 1):
        L.append(H[i] < H[i + 1])

    A = []
    B = []

    for i in range(N - 2):
        if not L[i] and L[i + 1]:
            A.append(i)

    for i in range(N - 2):
        if L[i] and not L[i + 1]:
            B.append(i)

    if len(A) == 2 and len(B) == 1 and A[0] < B[0] < A[1]:
        print("Yes")
    else:
        print("No")