#include <fstream>
#include <map>
#define MOD 666013

using namespace std;

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

int n;
map <int, int> M;

int main()
{
	int i, op, x;
	f >> n;

	for (i = 1; i <= n; i++){
		f >> op >> x;

		if (op == 1 && M.find(x)==M.end())
            M[x] = x%MOD;
		if (op == 2)
            M.erase(x);
		if (op == 3){
            if(M.find(x) != M.end()) g << "1\n";
            else g << "0\n";
		}
	}

	return 0;
}