#include <fstream>
#include <iostream>
#include <map>

using namespace std;

map<int, bool> sir;

int main()
{
    ifstream fin("hashuri.in");
    ofstream fout("hashuri.out");
    int n;
    fin >> n;
    int op, x;
    for(int i = 1; i <= n; ++i){
        fin >> op >> x;
        if(op == 1)
            sir[x] = 1;
        if(op == 2)
            sir[x] = 0;
        if(op == 3)
            fout << sir[x] << "\n";
    }
    return 0;
}