B

#include <bits/stdc++.h>

using namespace std;

#define ll     long long
#define _test   int _TEST; cin>>_TEST; while(_TEST--)
#define ff     first
#define ss     second
#define pb     push_back
#define ppb    pop_back


int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    _test
    {
        int n;
        cin>>n;

        vector<int> a(n);
        for(auto &e: a)
            cin>>e;

        string ans = "";
        vector<int> x;

        int ok = 0;

        for(auto e: a)
        {
            if(!ans.size())
            {
                ans += '1';
                x.pb(a[0]);
                continue;
            }

            if(e >= x.back() && !ok)
            {
                x.pb(e);
                ans += '1';
            }
            else if(!ok && e<=x.front())
            {
                ok = 1;
                x.pb(e);
                ans += '1';
            }
            else if(ok && e>=x.back() && e<=x.front())
            {
                ok = 1;
                x.pb(e);
                ans += '1';
            }
            else
                ans += '0';
        }

        cout<<ans<<"\n";
    }
}