import sys
input = sys.stdin.readline

T = int(input())
for _ in range(T):
    N = int(input())
    B = list(map(int, input().split()))
    A = []
    for b in B:
        if b != 1:
            A.append(b)
    N = len(A)
    if 2 not in A or 0 not in A:
        print("No")
        continue
    A = [A[-1]] + A + [A[0]]
    flag = 1
    for i in range(1, N + 1):
        if A[i] == 2 and (A[i - 1] == 2 or A[i + 1] == 2):
            flag = 0
            break
        if A[i] != 0 and (A[i - 1] == 2 and A[i + 1] == 2):
            flag = 0
            break
        if A[i] == 0 and (A[i - 1] == 0 or A[i + 1] == 0):
            flag = 0
            break
        if A[i] != 2 and (A[i - 1] == 0 and A[i + 1] == 0):
            flag = 0
            break
        
    print("Yes") if flag else print("No")