def solve():
    N = int(input())
    A = list(map(int, input().split()))
    ls = []
    prev = -1
    for i in range(N):
        if prev != A[i]:
            ls.append(1)
        else:
            ls[-1] += 1
        prev = A[i]
    if len(ls) % 2 == 0:
        print("Yes")
        return
    elif len(ls) >= 9:
        print("Yes")
        return
    else:
        if A[0] == 0:
            for i in range(len(A) - 1):
                if A[i] == A[i + 1] == 1:
                    print("Yes")
                    return 
        else:
            for i in range(len(A) - 1):
                if A[i] == A[i + 1] == 0:
                    print("Yes")
                    return 
    print("No")
    return 

T = int(input())
for _ in range(T):
    solve()