#include <fstream>
#include <set>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
int main()
{
    int n, i, instr, x, nr = 0;
    fin>>n;
    set <int> heapus;
    int v[200001];
    for(i = 0; i<n; i++)
    {
        fin>> instr;
        if(instr==1)
        {
            fin>> x;
            nr++;
            v[nr] = x;
            heapus.insert(x);
        }
        if(instr==2)
        {
            fin>> x;
            heapus.erase(v[x]);
        }
        if(instr==3)
            fout<< *heapus.begin() <<"\n";
    }
    return 0;
}