#include <fstream>
#include <iostream>
using namespace std;
ifstream in("hashuri.in");
ofstream out("hashuri.out");
const int Nmax=1000005;
bool a[Nmax];
int N,op;
long long x;
void Read()
{
    in>>N;
    for(int i=1;i<=N;i++)
    {
        in>>op>>x;
        if(op==1)
            a[x]=1;
        if(op==2)
            a[x]=0;
        if(op==3)
            out<<a[x]<<'\n';
    }
}
int main()
{
    Read();
    return 0;
}