T=int(input())
for _ in range(T):
  n=int(input())
  a=list(list(map(int,input().split())))
  b=list(list(map(int,input().split())))
  a=[(a[i],i) for i in range(n)]
  a.sort()
  ca=[0]+[a[i][0] for i in range(n)]
  cb=[0]+b[:]
  for i in range(n):
    ca[i+1]+=ca[i]
    cb[i+1]+=cb[i]
  k=max(list(range(n+1)),key=lambda i:-ca[i]+cb[i])
  f=[0]*n
  for v,i in a[:k]:
    f[i]=1
  print("".join(list(map(str,f))))