import io
import sys

sys.stdin = io.StringIO('''3
6
4 5 1 3 2 6
5
5 3 1 2 4
4
1 4 3 2''')


def fun(n, loc):
    ans = [0] * n
    ans[0] = 1

    l, r = loc[1], loc[1]
    for i in range(2, n + 1):
        l = min(l, loc[i])
        r = max(r, loc[i])
        if r - l + 1 == i:
            ans[i - 1] = 1

    print(''.join(map(str, ans)))


t = int(input())
for _ in range(t):
    n = int(input())
    p = []
    loc = [0] * (n + 1)
    nums = input().split()
    for i in range(n):
        num = int(nums[i])
        p.append(num)
        loc[num] = i

    fun(n, loc)

if __name__ == '__main__':
    pass