T=int(input())
for t in range(T):
    N=int(input())
    A=list(map(int,input().split()))
    if A[0]:
        for i in range(N):
            A[i]^=1
    if A[-1]:
        ans="Yes"
    else:
        if any(A[i] and A[i+1] for i in range(N-1)):
            ans="Yes"
        else:
            ans="No"
    print(ans)