T=int(input())
for _ in range(T):
    N=int(input())
    A=list(map(int,input().split()))
    B=list(map(int,input().split()))
    sm=sum(A)
    A=list(sorted([[A[i],i] for i in range(N)]))
    ans=["0" for _ in range(N)]
    mx=sm
    mxi=-1
    dp=[-1 for _ in range(2)]
    now=0
    dp[now]=sm
    for i in range(N):
        nxt=1-now
        dp[nxt]=dp[now]-A[i][0]+B[i]
        if dp[nxt]>mx:
            mx=dp[nxt]
            mxi=i
        now=1-now
    ans=["0" for _ in range(N)]
    for i in range(mxi+1):
        ans[A[i][1]]="1"
    print("".join(ans))