def solve():
    n = int(input())
    A = list(map(int, input().split()))
    if sum(A) != n or 0 not in A:
        return False

    for b in range(2):
        x = b
        ok = True
        for a in A:
            x = a - (1 - x)
            if x < 0 or 2 <= x:
                ok = False
                break

        if x != b:
            ok = False
        if ok:
            return True
    return False


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