#include <bits/stdc++.h>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");

long long v[200001],m,n;
int main()
{
    fin>>n;
    multiset<int> heap;
    for(int i=0; i<n; i++){
        int optiune,x;
        fin>>optiune;
        switch(optiune){
        case 1:
            fin>>x;
            v[++m]=x;
            heap.insert(x);
            break;
        case 2:
            fin>>x;
            heap.erase(v[x]);
            break;
        case 3:
            fout<<*heap.begin()<<endl;
            break;
        }
    }
    return 0;
}