T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    A = [(A[i],i) for i in range(N)]
    A = sorted(A,key=lambda x: x[0])
    C = [B[i]-A[i][0] for i in range(N)]
    cmax = 0
    tot = 0
    indmax = -1
    for i in range(N):
        tot += C[i]
        if tot > cmax:
            cmax = tot
            indmax = i
    if cmax>0:
        Ind = []
        for i in range(indmax+1):
            Ind.append(A[i][1])
        Ind = sorted(Ind)
        ans = ["0"]*N
        for i in Ind:
            ans[i] = "1"
        print("".join(ans))
    else:
        print("0"*N)