for _ in range(int(input())):
	n = int(input())
	a = list(map(int, input().split()))
	a.append(a[0])
	ok1 = True
	ok2 = False
	s = 0
	for i in range(n):
		if a[i] == a[i + 1] != 1:
			ok1 = False
		if a[i] == 0:
			ok2 = True
		s += a[i]
	print("Yes" if ok1 and ok2 and s == n else "No")