#include <set>
#include <fstream>
#define dim 200002

using namespace std;

ifstream f("heapuri.in");
ofstream r("heapuri.out");
int main(){
     int n, i, s, m, p = 1, v[dim];
    set<int> heap;

    f>>n;

    for (i=0; i<n; i++){
        f>>s;
        if(s == 1){
            f>>v[p];
            heap.insert(v[p-1]);
        } else if (s == 2){
            f>>m;
            heap.erase(v[m]);
        } else {
            set<int>::iterator t = heap.begin();
            r<<*t<<"\n";
        }
    }

    return 0;
}