#include<stdio.h>
#include<set>
using namespace std;
int n,poz[200002];
multiset<int> h;

void rezolv()
{
    int i,tip,x,k;
    scanf("%d",&n);
    k=0;
    for(i=1;i<=n;++i)
    {
        scanf("%d",&tip);
        if(tip==3)
            printf("%d\n",*h.begin());
        else
        {
            scanf("%d",&x);
            if(tip==1)
            {
                h.insert(x);
                ++k;
                poz[k]=x;
            }
            else
                h.erase(poz[x]);
        }
    }
}

int main()
{
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    rezolv();
    fclose(stdin);
    fclose(stdout);
    return 0;
}