#include <fstream>
#include <vector>

using namespace std;

ifstream f ("hashuri.in");
ofstream g ("hashuri.out");

int n;

int cerinta, val;

const int mod = 100003;

vector < int > v[100005];

int Hash (int x)
{
    int rez = x % mod;
    return rez;
}

void Add (int x)
{
    int cod = Hash(x);
    bool gasit = false;

    for (int i=0; i<v[cod].size() && !gasit; i++)
    {
        if (v[cod][i] == x)
            gasit = true;
    }

    if (!gasit) v[cod].push_back(x);
}

void Delete (int x)
{
    int cod = Hash(x);
    bool gasit = false;
    int index = 0;

    for (int i=0; i<v[cod].size() && !gasit; i++)
    {
        if (v[cod][i] == x)
        {
            index = i;
            gasit = true;
        }
    }

    if (gasit) v[cod][index] = 0;
}

bool Search (int x)
{
    int cod = Hash(x);

    for (int i=0; i<v[cod].size(); i++)
    {
        if (v[cod][i] == x)
            return true;
    }
    return false;
}

int main()
{
    f >> n;
    for (int i=1; i<=n; i++)
    {
        f >> cerinta >> val;

        if (cerinta == 1) Add(val);

        if (cerinta == 2) Delete(val);

        if (cerinta == 3) g << Search(val) << "\n";
    }
    return 0;
}