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