#include <cstdio>
#include <vector>
#define mod 666013

using namespace std;

vector <int> h[mod];
vector <int> :: iterator it;

int i,n,op,x,ind;

vector <int> :: iterator gasire(int x)
{
    for( it=h[ind].begin() ; it!=h[ind].end() ; it++ )
        if(*it==x)
            return it;
    return it;
}
void inserare(int x)
{
    if( it==h[ind].end() )
        h[ind].push_back(x);
}

void stergere (int x)
{
    if( it!=h[ind].end() )
        h[ind].erase(it);
}


void scriere (int x)
{
    if( it==h[ind].end() ) printf("0\n");
    else printf("1\n");

}

int main()
{
    freopen("hashuri.in","r",stdin);
    freopen("hashuri.out","w",stdout);

    scanf("%d\n",&n);

    for(i=1; i<=n; i++)
    {
        scanf("%d %d\n",&op,&x);

        ind= x % mod;
        it=gasire(x);
        if(op==1) inserare(x);
        else if(op==2)stergere(x);
        else if(op==3) scriere(x);
    }

    return 0;
}