#include <bits/stdc++.h>
#define Mod 666013
using namespace std;
ifstream f("hashuri.in");
ofstream g("hashuri.out");
vector<int>h[Mod];
vector<int>::iterator it;
int n,i,ind,x,op;
vector<int>::iterator Find(int x)
{
    for(it=h[ind].begin();it!=h[ind].end();it++)
        if(*it==x)return it;
    return it;
}
void Insert(int x)
{
    if(it==h[ind].end()) h[ind].push_back(x);
}
void Erase(int x)
{
    if(it!=h[ind].end()) h[ind].erase(it);
}
void Scrie(int x)
{
    if(it==h[ind].end())g<<"0"<<'\n';
    else g<<"1"<<'\n';
}
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>op>>x;
        ind=x%Mod;
        it=Find(x);
        if(op==1)Insert(x);
        if(op==2)Erase(x);
        if(op==3)Scrie(x);
    }
    return 0;
}