#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

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

vector <int> v[666013];
vector <int> :: iterator it;

int n,i,p;
long long x,x1;

int main()
{
    fin >> n;
    for (i=1;i<=n;i++)
    {
        fin >> p >> x;
        x1=x%666013;
        it=find(v[x1].begin(),v[x1].end(),x);
        if (p==1)
        {
            if (it==v[x1].end()) v[x1].push_back(x);
            continue;
        }
        if (p==2)
        {
            if (it!=v[x1].end()) v[x1].erase(it);
            continue;
        }
        if (it!=v[x1].end()) fout << 1;
        else fout << 0;
        fout << "\n";
    }

    return 0;
}