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#include <bits/stdc++.h>
#define ll long long
//#define fin cin
//#define fout cout
using namespace std;
const int MOD=999983;
ifstream fin ("hashuri.in");
ofstream fout ("hashuri.out");
vector< list<int> > hash_list (1000005);
//bool ciur[1000005];
int main()
{
fin.tie(0); fin.sync_with_stdio(false);
/*
int biggest_prim=0;
for (int i=2; i*i<=1000000; i++) {
if (ciur[i]==0) {
for (int j=i*i; j<=1000000; j+=i) {
ciur[j]=1;
}
}
}
for (int j=1000000; j>=0; j--) {
if (ciur[j]==0) {
biggest_prim=j;
break;
}
}
cout<<biggest_prim<<endl;
*/
//Pentru a gasi valoarea lui MOD;
int n, a, b; fin>>n;
for (int i=1; i<=n; i++) {
fin>>a>>b;
int index=b%MOD;
bool in_list=false;
auto it=find(hash_list[index].begin(), hash_list[index].end(), b);
if (a==1) {
if (it==hash_list[index].end()) {
hash_list[index].insert(it, b);
}
}
if (a==2) {
if (it!=hash_list[index].end()) {
hash_list[index].erase(it);
}
}
if (a==3) {
bool ans=it!=hash_list[index].end();
fout<<ans<<'\n';
}
}
return 0;
}