#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;
    int x[n] = {0};
    while(--n)
    {
        int a, szam;
        cin >> a >> szam;
        if(a == 1)
        {
            x[szam] = szam;
        }
        else if (a == 2)
        {
            x[szam] = 0;
        }
        else
        {
            if(x[szam] == szam)
                cout << 1 << '\n';
            else
                cout << 0 << '\n';
        }
    }
    return 0;
}