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#include <bits/stdc++.h>
#define nr 666013
using namespace std;
int n,cerinta,x,adevar;
vector < int >a[666014];
void cauta1(int x)
{
for(int i=0;i<a[x%nr].size();i++)
{
if(a[x%nr][i]==x)
{
a[x%nr][i]=-1;
}
}
}
int cauta(int x)
{
bool ok=false;
for(int i=0;i<a[x%nr].size() && ok==false;i++)
{
if(a[x%nr][i]==x)ok=true;
}
if(ok==true)return 1;
else return 0;
}
int main()
{
ifstream f("hashuri.in");
ofstream g("hashuri.out");
f>>n;
for(int i=1;i<=n;i++)
{
f>>cerinta>>x;
if(cerinta==1)
{
a[x%nr].push_back(x);
}
else if(cerinta==2)
{
cauta1(x);
}
else
{
g<<cauta(x)<<'\n';
}
}
return 0;
}