def solve():
    n = int(input())
    aa = list(map(int, input().split()))

    zero_num = aa.count(0)
    two_num = aa.count(2)

    if (
        zero_num == 0
        or zero_num > n // 2
        or two_num == 0
        or two_num > n // 2
        or zero_num != two_num
    ):
        return False

    if any(aa[i] == aa[(i + 1) % n] and aa[i] in (0, 2) for i in range(n)):
        return False

    return True


def main():
    t = int(input())
    for _ in range(t):
        print("Yes" if solve() else "No")


main()