#include<fstream>
#include<vector>
using namespace std;
ifstream in("hashuri.in");
ofstream out("hashuri.out");
const int MOD = 660013;
vector<int> v[MOD];

int este_in_multime(int n)
{

    int p = n%MOD;
    for(int i = 0 ; i < v[p].size() ; i++)
        if(v[p][i] == n) return 1;
    return 0;
}
void adauga(int n)
{
    if(!este_in_multime(n));
        v[(n%MOD)].push_back(n);
}

void del(int n)
{

    int p = n%MOD;
    for(int i = 0 ; i < v[p].size() ; i++)
        if(v[p][i] == n) v[p].erase(v[p].begin()+i);
}

int main()
{

    int T;
    in>>T;
    int i,j;
    for( ; T ; --T)
    {

        in>>i;
        if(i == 1){
            in>>j;
            adauga(j);
            continue;
        }
        if(i == 2){
            in>>j;
            del(j);
            continue;
        }
        if(i == 3)
        {
            in>>j;
            out<<este_in_multime(j)<<"\n";
        }
    }
    return 0;
}