#include <fstream>
#include <set>
using namespace std;
set <int> heap;
int t,i,a,r,x,poz[200002];
int main()
{
    ifstream f("heapuri.in");
    ofstream g("heapuri.out");

    f>>t;
    for(i=1;i<=t;i=i+1)
    {
        f>>x;
        if(x==1)
        {
            f>>a;
            heap.insert(a);
            poz[++r]=a;
        }
        if(x==2)
        {
            f>>a;
            heap.erase(poz[a]);
        }
        if(x==3)
        g<<*heap.begin()<<'\n';
    }
    return 0;
}