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


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