#include <iostream>
#include <cstdio>
#include <vector>
#define B 474707
using namespace std;
int op,N,val;
vector <int> H[B+1];
int main()
{
    freopen("hashuri.in","r",stdin);
    freopen("hashuri.out","w",stdout);
    cin>>N;
    for(int i=1;i<=N;i++)
    {
        cin>>op>>val;
        if(op==1)
        {
            bool ok=0;
            for(vector<int> ::iterator it=H[val%B].begin();it!=H[val%B].end();it++)
            {
                if(*it==val)
                {
                    ok=1;
                    break;
                }
            }
            if(!ok)
                H[val%B].push_back(val);
        }
        else if(op==2)
        {
            for(vector<int> ::iterator it=H[val%B].begin();it!=H[val%B].end();it++)
            {
                if(*it==val)
                {
                    H[val%B].erase(it);
                    break;
                }
            }
        }
        else
        {
            bool ok=0;
            for(vector<int> ::iterator it=H[val%B].begin();it!=H[val%B].end();it++)
            {
                if(*it==val)
                {
                    ok=1;
                    break;
                }
            }
            cout<<ok<<"\n";
        }
    }
    return 0;
}