#include <fstream>
#include <set>
#include <queue>
using namespace std;
ifstream cin("heapuri.in");
ofstream cout("heapuri.out");
int n,v[200005],k;
multiset<int>s;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        int cer;
        cin>>cer;
        if(cer==1)
        {
            int x;
            cin>>x;
            v[++k]=x;
            s.insert(x);
        }
        else if(cer==2)
        {
            int x;
            cin>>x;
            s.erase(v[x]);
        }
        else
        {
            cout<<*s.begin()<<'\n';
        }
    }
    return 0;
}