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#include <bits/stdc++.h>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
int n, op, v[200001], cnt;
multiset<int> ms;
int main(){
ios_base::sync_with_stdio(false);
fin.tie(0);
fout.tie(0);
fin >> n;
for(int i = 1; i <= n; i++){
fin >> op;
if(op != 3){
int x;
fin >> x;
if(op == 1){
v[++cnt] = x;
ms.insert(x);
}
else{
ms.erase(ms.find(v[x]));
}
}
else{
fout << *ms.begin() << '\n';
}
}
}