#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <limits.h>

#define MOD 666013

using namespace std;

vector<int> H[MOD];
int srch(int x)
{
    int index = x % MOD;
    vector<int>::iterator it = find(H[index].begin(), H[index].end(), x);
    if(it != H[index].end())
        return 1;
    return 0;
}
void add(int x)
{
    int index = x % MOD;
    if(!srch(x))
        H[index].push_back(x);
}
void rem(int x)
{
    int index = x % MOD;
    vector<int>::iterator it = find(H[index].begin(), H[index].end(), x);
    if(it != H[index].end())
        H[index].erase(it);
}
int main()
{
    ifstream in("hashuri.in");
    ofstream out("hashuri.out");
    int n;
    in >> n;
    for(int i = 1; i <= n; i++)
    {
        int op, x;
        in >> op >> x;
        switch(op)
        {
        case 1:
            add(x);
            break;
        case 2:
            rem(x);
            break;
        case 3:
            out << srch(x) << "\n";
            break;
        default:
            ;
        }
    }
    in.close();
    out.close();
}