#include <iostream>
#include <fstream>
#include <bitset>
#define Nmax 1299827

using namespace std;

fstream f("hashuri.in", ios::in);
fstream g("hashuri.out", ios::out);

bitset<2000000001> b;

int main()
{
    int n;
    f>>n;

    for(int i = 0; i < n; ++i)
    {
        int a;
        long long int x;
        f>>a>>x;
        if(a == 1)
            b[x] = 1;
        if(a == 2)
            b[x] = 0;
        if(a == 3)
            g<<b[x]<<'\n';
    }

    return 0;
}