#include <cstdio>
#include<set>
#include <vector>
using namespace std;
vector <int> valoare;
multiset <int> heap;
int n,t,x;
int main()
{
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);

    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        scanf("%d",&t);
        if(t==1)
        {
            scanf("%d",&x);
            heap.insert(x);
            valoare.push_back(x);
        }
        else
        {
            if(t==2)
            {
                scanf("%d",&x);
                heap.erase(valoare[x]);
            }
            else
            {
                printf("%d\n",*heap.begin());
            }
        }
    }
    return 0;
}