for _ in range(int(input())):
    N = int(input())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    Ai = [(A[i], i) for i in range(N)]
    Ai.sort()
    s = t = sum(A)
    k = -1
    for i in range(N):
        s += B[i]
        s -= Ai[i][0]
        if s > t:
            k = i
            t = s
    ans = ["0"] * N
    for i in range(k + 1):
        ans[Ai[i][1]] = "1"
    print("".join(ans))