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''')


# TLE
def fun(n, p):
    ans = [0] * n
    loc = [0] * n
    for i in range(n):
        loc[i] = (p.index(i + 1))

    for i in range(n):
        nums = loc[:i + 1]
        nums.sort()
        flag = True
        for j in range(1, i + 1):
            if nums[j] - nums[j - 1] > 1:
                flag = False
                break

        if flag:
            ans[i] = 1

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


t = int(input())
for _ in range(t):
    n = int(input())
    p = list(map(int, input().split()))
    fun(n, p)

    if __name__ == '__main__':
        pass