#include<fstream>
#define MOD 666013
#include<vector>
using namespace std;
ifstream f("hashuri.in");
ofstream g("hashuri.out");
int l,o,n,i,x;
vector<int>a[MOD];
void adauga(int val)
{
    vector<int>::iterator it;
    for(it=a[l].begin();it!=a[l].end();++it)
    if(*it==val)
    return;
    a[l].push_back(val);
}
void sterge(int val)
{
    vector<int>::iterator it;
    for(it=a[l].begin();it!=a[l].end();++it)
    if(*it==x)
    {
        a[l].erase(it);
        return ;
    }
}
int main()
{
    f>>n;
    for(;n;--n)
    {
        f>>o>>x;
        l=x%MOD;
        if(o==1)
        adauga(x);
        else
        if(o==2)
        sterge(x);
        else
        if(o==3)
        {
            vector<int>::iterator it;
            for(it=a[l].begin();it!=a[l].end();++it)
            if(*it==x)
            {
                g<<1<<'\n';
                break;
            }
            if(it==a[l].end())
            g<<0<<'\n';
        }
    }
    return 0;
}