for _ in range(int(input())):
  n=int(input())
  a=[*map(int,input().split())]
  b=[*map(int,input().split())]
  a=sorted((a[i],i)for i in range(n))
  ans=s=sum(i for i,j in a)
  nb=0
  ans1=-1
  for i in range(n):
    s-=a[i][0]
    nb+=b[i]
    if nb+s>ans:
      ans1=i
      ans=nb+s
  ans=['0']*n
  for i in range(ans1+1):
    ans[a[i][1]]='1'
  print(''.join(ans))