for _ in range(int(input())):
	n = int(input())
	A = list(map(int, input().split()))
	B = list(map(int, input().split()))
	a_ = sum(A)
	A = [(A[i], i) for i in range(n)]
	A.sort()
	ans = a_
	now = ans
	for i in range(n):
		now -= A[i][0] - B[i]
		ans = max(ans, now)
	now = a_
	C = [0] * n
	if now == ans:
		print("".join([str(C[i]) for i in range(n)]))
	else:
		for i in range(n):
			now -= A[i][0] - B[i]
			C[A[i][1]] = 1
			if now == ans:
				print("".join([str(c) for c in C]))
				break