#include <bits/stdc++.h>

using namespace std;
ifstream in("hashuri.in");
ofstream out("hashuri.out");
const int mod=666013;
vector < int > v[mod+1];
int n, x , op;
int main()
{
    for(in>>n;n;n--)
    {
        in>>op>>x;
        int loc=x%mod;
        vector < int > :: iterator it=find(v[loc].begin(),v[loc].end(),x);
        if(op==1)
        {
            if(it==v[loc].end())
                v[loc].push_back(x);
        }
        else if (op==2)
        {
            if(it!=v[loc].end())
                v[loc].erase(it);
        }
        else if(op==3)
            out<<(it!=v[loc].end()? 1:0)<<'\n';
    }
    return 0;
}