INF = 1<<60

for _ in range(int(input())):
    N = int(input())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))

    A = sorted(enumerate(A), key=lambda x:x[1])
    
    ans = [0]*N
    MAX = 0
    idx = -1
    sumA = 0
    sumB = 0
    for i in range(N):
        sumA += A[i][1]
        sumB += B[i]
        if MAX < sumB-sumA:
            MAX = sumB-sumA
            idx = i
    if 0 <= idx:
        for i in range(idx+1):
            ans[A[i][0]] = 1
    
    print("".join(map(str, ans)))