#include <iostream>
#include <cstdio>
#include <set>
using namespace std;
int n,x,vec[200001],t,b;
int main()
{
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    scanf("%d",&n);
    set <int> my_set;
    for(int i=0;i<n;i++)
    {
        scanf("%d",&b);
        if(b==1)
        {
            scanf("%d",&x);
            my_set.insert(x);
            vec[t++]=x;
        }
        if(b==2)
        {
            scanf("%d",&x);
            my_set.erase(vec[x-1]);
        }
        if(b==3)
        {

            printf("%d\n",*my_set.begin());
        }
    }
    return 0;
}