#include <fstream>
#include <vector>
using namespace std;
ifstream f("hashuri.in");
ofstream g("hashuri.out");

const int mod=100003;
int N, x, tip;
vector < int > H[mod];
vector < int >::iterator it;

void add(int val)
{
    int r=val%mod; it=H[r].begin();
    for (; it!=H[r].end(); ++it)
        if (*it==val) return;
    H[r].push_back(val);
}

void elim(int val)
{
    int r=val%mod; it=H[r].begin();
    for (; it!=H[r].end(); ++it)
        if (*it==val)
        {
            *it=H[r].back();
            H[r].pop_back();
            return;
        }
}

bool cauta(int val)
{
    int r=val%mod; it=H[r].begin();
    for (; it!=H[r].end(); ++it)
        if (*it==val) return 1;
    return 0;
}

int main()
{
    f>>N;
    for (int i=1; i<=N; ++i)
    {
        f>>tip>>x;
        if (tip==1) add(x);
            else if (tip==2) elim(x);
                else if (cauta(x)) g<<"1\n";
                    else g<<"0\n";
    }
    return 0;
}