pub mod base {
    use std::fmt::Debug;

    #[derive(Default, Debug, Clone)]
    pub struct MaxComparator {}
    pub trait Comparator: Default + Debug + Clone {}
    impl Comparator for MaxComparator {}

    #[derive(Debug)]
    pub struct BinaryHeap<T, C>
    {
        vec: Vec<T>,
        cmp: C,
    }

    impl<T, C> From<Vec<T>> for BinaryHeap<T, C>
    where C: Comparator
    {
        fn from(vec: Vec<T>) -> Self {
            BinaryHeap {
                vec,
                cmp: C::default(),
            }
        }
    }
}

pub type BinaryHeap<T> = base::BinaryHeap<T, base::MaxComparator>;

fn main() {
    let heap = BinaryHeap::from(vec![0, 1, 2]);
    println!("{:?}", heap);
}