#include <fstream>
#define z 666013

using namespace std;
int n,a[1000000],b[1000000],r[z],e,t,c,x,i,p;
bool ok;
int main()
{
ifstream f("hashuri.in");
ofstream g("hashuri.out");
f >> n;
for(i=1;i<=n;i++){
    f >> t >> x;
    switch(t){
    case 1:
    e=x%z;
    ok=1;
    p=r[e];
    while(p){
        if(a[p]==x){
            ok=0;
            break;
        }
        p=b[p];
    }
    if(ok){
        a[c]=x;
        b[c]=r[e];
        r[e]=c;
        c++;
    }
    break;
    case 2:
    e=x%z;
    p=r[e];
    while(p){
        if(a[p]==x){
            a[p]=-1;
            break;
        }
        p=b[p];
    }
    break;
    default:
    e=x%z;
    p=r[e];
    ok=1;
    while(p){
        if(a[p]==x){
            ok=0;
            g << 1 << '\n';
            break;
        }
        p=b[p];
    }
    if(ok) g << 0 << '\n';
}
}
}