#include <cstdio>
#include <set>
using namespace std;
int v[200005];
int main()
{
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    multiset <int> heap;
    int t,i,n=0,o,x;
    scanf("%d",&t);
    for(i=1;i<=t;i++)
    {
        scanf("%d",&o);
        if(o==3)
        {
            multiset <int> :: iterator it = heap.begin();
            printf("%d\n",*it);
        }

        else
        {
            scanf("%d",&x);
            if(o==1)
            {
                v[++n]=x;
                heap.insert(x);
            }
            else
                heap.erase(heap.find(v[x]));

        }
    }
    return 0;
}