#include<bits/stdc++.h>
using namespace std;
ifstream A("hashuri.in");
ofstream B("hashuri.out");
#define M 666013
int n,o,x;
vector<int> G[M];
inline vector<int>::iterator F(int x)
{
    int l=x%M;
    vector<int>::iterator i;
    for(i=G[l].begin();i!=G[l].end();++i)
        if(*i==x)
            return i;
    return G[l].end();
}
inline void I(int x)
{
    int l=x%M;
    if(F(x)==G[l].end())
        G[l].push_back(x);
}
inline void E(int x)
{
    int l=x%M;
    vector<int>::iterator i=F(x);
    if(i!=G[l].end())
        G[l].erase(i);
}
int main()
{
    for(A>>n;n;--n) {
        A>>o>>x;
        if(o==1)
            I(x);
        else if(o==2)
            E(x);
        else
            B<<(F(x)!=G[x%M].end())<<"\n";
    }
    return 0;
}