#include <bits/stdc++.h>

using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");
multiset < int > m;
vector < int > v;
int n,op,x;
int main()
{
    for(in>>n;n;n--)
    {
        in>>op;
        if(op==1)
        {
            in>>x;
            v.push_back(x);
            m.insert(x);
        }
        else if(op==2)
        {
            in>>x;
            m.erase(find(m.begin(),m.end(),v.at(x-1)));
        }
        else out<<*m.begin()<<'\n';
    }
    return 0;
}