#include <fstream>
#include <vector>
using namespace std;
const int mod = 666013;
vector<int> sir[666666];
int n, x, cer, p;
bool cnt;
int main()
{
    ifstream fin("hashuri.in");
    ofstream fout("hashuri.out");
    fin >> n;
    for (int i = 1; i <= n; ++i)
    {
        fin >> cer >> x;
        p = x % mod;
        if (cer == 1)
            sir[p].push_back(x);
        else if (cer == 2)
        {
            for (int i = 0; i < (int)sir[p].size(); ++i)
                if (sir[p][i] == x)
                {
                    sir[p].erase(sir[p].begin() + i);
                    break;
                }
        }
        else
        {
            cnt = 0;
            for (auto y: sir[p])
                if (x == y)
                {
                    cnt = 1;
                    break;
                }
            fout << cnt << '\n';
        }
    }
    fin.close();
    fout.close();
    return 0;
}