#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

ifstream fin("hashuri.in");
ofstream fout("hashuri.out");

vector <int>a[666015];
vector <int>::iterator it;

int i,n,p,x,r;

int main()
{
    fin >> n;
    for (i=1;i<=n;i++)
    {
        fin >> p >> x;
        r=x%666013;
        it=find(a[r].begin(),a[r].end(),x);
        if (p==1)
        {
            if (it==a[r].end()) a[r].push_back(x);
            continue;
        }
        if (p==2)
        {
            if (it!=a[r].end()) a[r].erase(it);
            continue;
        }
        if (it!=a[r].end()) fout << 1;
        else fout << 0;
        fout << "\n";
    }

    return 0;
}