#include <fstream>
#include <bitset>
using namespace std;
int viz[500000002];
int main()
{
    int n,op,x;
    ifstream in("hashuri.in");
    ofstream out("hashuri.out");
    in>>n;
    for(int i=1;i<=n;i++)
    {
        in>>op>>x;
        if(op==1)
            viz[x]=1;
        if(op==2)
            viz[x]=0;
        if(op==3)
            out<<viz[x]<<"\n";
    }
    return 0;
}