#include <bits/stdc++.h>

using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
set<int> s;
int n,x,g,a[200005],C;
int main()
{   fin>>n;
    for(int i=1;i<=n;i++){
        fin>>C;
        if(C==1){g++;fin>>a[g];s.insert(a[g]);}
        else if(C==2){fin>>x;s.erase(s.find(a[x]));}
        else fout<<*s.begin()<<"\n";
    }

    return 0;
}