#include <bits/stdc++.h>

using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
multiset<int>myset;
vector<int>elem;
int n,c,x;
int main()
{
    fin>>n;
    elem.push_back(0);
    for(int i=1;i<=n;i++)
    {
        fin>>c;
        if(c==1)
        {
            fin>>x;
            myset.insert(x);
            elem.push_back(x);
            continue;
        }
        if(c==2)
        {
            fin>>x;
            myset.erase(myset.find(elem[x]));
            continue;
        }
        fout<<*myset.begin()<<"\n";
    }
    return 0;
}