#include <bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    freopen("heapuri.in", "r", stdin);
    freopen("heapuri.out", "w", stdout);
    set<int> s;
    int n, op, el;
    cin>>n;
    int v[n+1], k=0;
    for(int i=1; i<=n; i++)
    {
        cin>>op;
        if(op==1)
        {
            cin>>el;
            s.insert(el);
            v[++k]=el;
        }
        if(op==2)
        {
            cin>>el;
            s.erase(v[el]);
        }
        if(op==3)
            cout<<*s.begin()<<'\n';
    }
    return 0;
}