T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    IA = sorted(enumerate(A), key=lambda x: x[1])
    ans_c = 0
    cur_v = ans_v = sum(A)
    for c, ((_, a), b) in enumerate(zip(IA, B), 1):
        cur_v = cur_v - a + b
        if cur_v > ans_v:
            ans_c = c
            ans_v = cur_v
    ans = [0] * N
    for i in range(ans_c):
        ans[IA[i][0]] = 1
    print(*ans, sep='')