#include <fstream>
#include <vector>

using namespace std;
#define MOD 666013
ifstream f("hashuri.in");
ofstream g("hashuri.out");
int N;
vector<int> G[MOD];

inline vector<int>::iterator find_value(int x)
{
    int list = x % MOD;
    vector<int>::iterator it;

    for (it = G[list].begin(); it != G[list].end(); ++it)
        if (*it == x)
            return it;
    return G[list].end();
}

inline void insert_value(int x)
{
    int list = x % MOD;    
    if (find_value(x) == G[list].end())
        G[list].push_back(x);
}

inline void erase_value(int x)
{
    int list = x % MOD;
    vector<int>::iterator it = find_value(x);
    
    if (it != G[list].end())
        G[list].erase(it);
}

int main()
{
    int op, x;
    for (f>>N; N; --N)
    {
        f>>op>>x;
        if (op == 1) // inserare
        {
            insert_value(x);
            continue;
        }
        if (op == 2) // stergere
        {
            erase_value(x);
            continue;
        }
        g<<(find_value(x) != G[x % MOD].end())<<"\n";
    }

    return 0;
}