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

    return 0;
}