#include <fstream>
#include <vector>
using namespace std;

#define MOD 666013

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

int T, op, number;
vector<int> G[MOD];

inline int h(int number) {
    return number % MOD;
}

inline vector<int>::iterator findValue(int number) {
    int key = h(number);
    for (auto it = G[key].begin(); it != G[key].end(); ++it)
        if (*it == number)
            return it;
    return G[key].end();;
}

inline void insertValue(int number) {
    int key = h(number);
    if (findValue(number) == G[key].end())
        G[key].push_back(number);
}

inline void eraseValue(int number) {
    int key = h(number);
    auto it = findValue(number);
    if (it != G[key].end())
        G[key].erase(it);
}

int main() {
    for (f >> T; T; --T) {
        f >> op >> number;
        if (op == 1) insertValue(number);
        else if (op == 2) eraseValue(number);
        else g << (findValue(number) != G[h(number)].end()) << "\n";
    }
}