#include <bits/stdc++.h>

using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
multiset<int>s;
vector<int>v;
int n,c,x;
int main()
{
    fin>>n;
    v.push_back(0);
    for(int i=1;i<=n;i++)
    {
        fin>>c;
        if(c==1)
        {
            fin>>x;
            v.push_back(x);
            s.insert(x);
        }
        if(c==2)
        {
            fin>>x;
            s.erase(s.find(v[x]));
        }
        if(c==3)
        {
            fout<<*s.begin()<<'\n';
        }
    }
    return 0;
}