#include <fstream>
#include <vector>

using namespace std;

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

int mod = 666013;
int n, x, op;
bool OK;
vector <int> v[666015];

void adauga (int x)
{
    OK = 1;

    for (int i = 0; i < v[x % 666013].size(); i++)
    {
        if (v[x % 666013][i] == x)
        {
            OK = 0;
            break;
        }
    }

    if (OK == 1)
    v[x % 666013].push_back(x);
}

void sterge (int x)
{
    for (int i = 0; i < v[x % 666013].size(); i++)
    {
        if (v[x % 666013][i] == x)
        {
            swap (v[x % 666013][i], v[x % 666013][v[x % 666013].size() - 1]);
            v[x % 666013].pop_back();
            return;
        }
    }
}

void afisare (int x)
{
    for (int i = 0; i < v[x % 666013].size(); i++)
    {
        if (v[x % 666013][i] == x)
        {
            out << 1 << '\n';
            return;
        }
    }

    out << 0 << '\n';
}

int main()
{
    in >> n;

    for (int i = 1; i <= n; i++)
    {
        in >> op >> x;

        if (op == 1)
            adauga(x);

        else

        if (op == 2)
            sterge(x);

        else

            afisare(x);
    }

    return 0;
}