for _ in range(T := int(input())):
  N = int(input())

  S = N*(N+1)//2
  if S%2 == 1:
    print(-1)
    continue

  S //= 2
  ans = ['0']*N
  for i in range(1, N+1):
    S -= i
    ans[i-1] = '1'
    if S <= 0: break
  if S < 0: ans[-S-1] = '0'
  print("".join(ans))