#include <cstdio>
#include <set>
using namespace std;
set <int> heap;
int ord[200005],l,n,i,tipOp,x;
int main()
{
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    scanf("%d",&n);
    for (i=1;i<=n;i++)
    {
        scanf("%d",&tipOp);
        if (tipOp==1)
        {
            scanf("%d",&x); ord[++l]=x;
            heap.insert(x);
        }
        else if (tipOp==2)
        {
            scanf("%d",&x);
            heap.erase(ord[x]);
        }
        else printf("%d\n",*heap.begin());
    }
}