# https://yukicoder.me/problems/no/3434

def solve(N, A, B):
    a_array = [(i, A[i]) for i in range(N)]
    a_array.sort(key=lambda x: x[1])

    cum_b_array = [0] * (N + 1)
    b = 0
    for i in range(N):
        b += B[i]
        cum_b_array[i + 1] = b

    answer = -1
    answer_index = -1
    cum_a = sum(A)
    for i in range(N + 1):
        ans = cum_a + cum_b_array[i]
        if answer < ans:
            answer = ans
            answer_index = i

        if i < N:
            cum_a -= a_array[i][1]

    answer_list = ["0" for _ in range(N)]
    for i in range(answer_index):
        answer_list[a_array[i][0]] = "1"

    return "".join(answer_list)


def main():
    T = int(input())
    answers = []
    for _ in range(T):
        N = int(input())
        A = list(map(int ,input().split()))
        B = list(map(int ,input().split()))
        ans = solve(N, A, B)
        answers.append(ans)

    for ans in answers:
        print(ans)





if __name__ == "__main__":
    main()