import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

for _ in range(ni()):
    n = ni()
    s = n * (n+1) // 2
    if s % 2:
        print(-1)
    else:
        s //= 2
        a = [0] * (n+1)
        for i in range(n,0,-1):
            if i <= s:
                s -= i
                a[i] = 1
        print("".join(map(str,a[1:])))