I didn't some exercices because I want to focus on the language OCaml, and not data structures
The day03 is focused on trees (binary search trees, AVL-trees, binary trees) and compilation methods.
We implement binary trees, binary search trees and AVL-trees. We are free to use how we want to build our executables: Makefile (with or without https://github.com/mmottl/ocaml-makefile, ocamlfind. We can choose which compilers (ocamlc or ocamlopt) we want to use.
We learn how to use C-binded library, modules, file types and command line arguments (argv).
OPAM is also introduce and we learn basics about merlin and ocp-indent.