#include <iostream>
#include <fstream>
using namespace std;
ifstream fi("heapuri.in");
ofstream fo("heapuri.out");
int v[200002],n;

int main()
{
    fi>>n;
    int nr=0;
    for (int i=1;i<=n;i++) {
        fi>>x;
        if (x==3)
            fo<<v[1];
        else
            if (x==1) {
                fi>>y;
                nr++;
                if (v[nr/2]<=y)
                    v[nr]=y;
                else {
                    int j=nr;
                    while (v[j/2]>y) {
                        v[j]=v[j/2];
                        v[j/2]=y;
                        j=j/2;
                    }
                }
            }
            else {
                fi>>y;
            }
    }
    return 0;
}