#include <cstdio>
#include <vector>
#define MOD 666013
using namespace std;

vector <int> a[MOD];
inline vector<int>::iterator find_value(int x){
    int l=x%MOD;
    vector<int>::iterator it;
    for(it=a[l].begin();it!=a[l].end();++it)
        if(*it==x)
            return it;
    return a[l].end();
}
inline void insert_value(int x){
    int l=x%MOD;
    if(find_value(x)==a[l].end())
        a[l].push_back(x);
}
inline void erase_value(int x){
    int l=x%MOD;
    vector<int>::iterator it=find_value(x);
    if(it!=a[l].end())
        a[l].erase(it);
}
int n,x,caz;
int main()
{
    freopen("hashuri.in", "r", stdin);
    freopen("hashuri.out", "w", stdout);
    scanf("%d", &n);
    int nr=0;
    for(int i=1;i<=n;++i){
        scanf("%d%d", &caz,&x);
        if(caz==1)
            {insert_value(x);continue ;}
        if(caz==2)
            {erase_value(x);continue ;}
        printf("%d\n",find_value(x)!=a[x%MOD].end());

    }
    return 0;
}