#include <fstream>
#include<vector>
#include<set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int n,i,membru,k,x;
vector<int> v;
multiset<int> s;
int main()
{
    f>>n;
for(i=1;i<=n;i++)
    {f>>k;
        if(k==1)
        {
            f>>x;
            s.insert(x);
            v.push_back(x);
        }
        if(k==2)
        {
            f>>x;
            membru=v[x-1];
            s.erase(s.find(membru));
        }
        if(k==3)
        {
            g<<*s.begin()<<'\n';
        }
    }
    return 0;
}