#include <bits/stdc++.h>

using namespace std;
ifstream fin ("hashuri.in");
ofstream fout ("hashuri.out");

const int HASH_MAX = 1000007;

int n, op, x;
int has(int a){
    return a % HASH_MAX;
}
bool fr[HASH_MAX+1];

int main()
{
    fin >> n;
    for(int i = 1; i <= n; i++){
        fin >> op >> x;
        if(op == 1){
            fr[has(x)] = 1;
        }
        else if(op == 2){
            fr[has(x)] = 0;
        }
        else{
            fout << fr[has(x)] << "\n";
        }
    }
    return 0;
}