#include<fstream>
#include<cstdio>
#include<set>
#include<vector>
using namespace std;
ifstream fin("heap.in");
ofstream fout("heap.out";)
multiset<int>ms;
int n,m,i,j,a,b,c,x;
vector<int>v;
int main()
{
    ios::sync_with_stdio(false);
    fin.tie(0);
    fin>>n;
    v.push_back(0);
    for(i=1;i<=n;++i)
    {
        cin>>x;
        if(x==1)
        {
            fin>>a;
            ms.insert(a);
            v.push_back(a);
        }
        if(x==2)
        {
            fin>>a;
            auto it =ms.find(v[a]);
            if(it!=ms.end())
                ms.erase(it);
        }
        if(x==3)
        {
            auto it=ms.begin();
            fout<<*it<<'\n';
        }
    }
    return 0;
}