#include <fstream>
#include <vector>

using namespace std;

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

const int MOD = 666013;

int N;
vector <int> v[MOD + 5];

int main()
{
    fin >> N;

    int type, x;
    for(int i = 1; i <= N; i++)
    {
        fin >> type >> x;

        if(type == 1)
        {
            bool isX = false;

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

            if(isX == false)
                v[x % MOD].push_back(x);
        }
        else if(type == 2)
        {
            vector <int>::iterator it;

            for(it = v[x % MOD].begin(); it != v[x % MOD].end() && *it != x; it++);

            if(it != v[x % MOD].end())
                v[x % MOD].erase(it);
        }
        else
        {
            bool isX = false;

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

            if(isX == false)
                fout << 0 << '\n';
            else
                fout << 1 << '\n';
        }
    }

    return 0;
}