#include <bits/stdc++.h>

#define NMax 200005

using namespace std;

ifstream fin("heapuri.in");
ofstream fout("heapuri.out");

int N;
multiset<int> H;
int o[NMax],K;

int main()
{
    fin>>N;
    while(N--)
    {
        int op,x;
        fin>>op;
        if(op==1)
        {
            fin>>x;
            H.insert(x);
            o[++K]=x;
        }
        if(op==2)
        {
            fin>>x;
            H.erase(o[x]);
        }
        if(op==3)
            fout<<*H.begin()<<"\n";
    }
    return 0;
}