#include <fstream>
#include <vector>
using namespace std;
ifstream f("hashuri.in");
ofstream g("hashuri.out");
vector <int> h[769553];
int n, element, operatie, i, cheie, mod = 769553;

void inserare(int element, int cheie)
{
    for(i=0; i < h[cheie].size(); i++)
        if (h[cheie][i]==element)
            break;
    h[cheie].push_back(element);

}
void stergere(int element, int cheie)
{
    for(i=0; i < h[cheie].size(); i++)
        if (h[cheie][i]==element)
            h[cheie].erase(h[cheie].begin()+i);
}

int cautare(int element, int cheie)
{
    for(i=0; i < h[cheie].size(); i++)
        if (h[cheie][i]==element)
            return 1;
    return 0;
}
int main()
{
    f>>n;
    for(i = 0; i < n; i++)
    {
        f>>operatie>>element;
        cheie = element % mod;
        if (operatie==1)
            inserare(element, cheie);
        else
            if(operatie==2)
            stergere(element, cheie);
        else
            g<<cautare(element, cheie);
    }
    f.close();
    g.close();
}