# 5. Report contents / Зміст звіту

The report is submitted together with the source code. It must contain the
following sections.

1. **Title block** — course, laboratory work number and title, student's name
   and group, date.
2. **Objective** — a short statement of the goal of the work (see
   [1purpose.md](1purpose.md)).
3. **Brief theory** — the definition of a set and of each implemented operation
   (union, intersection, difference, complement), in your own words and using
   the notation of [Lecture 2](../../Lectures/CDM-L02.md).
4. **Chosen representation** — how a set is stored *without* a built-in set
   type, and how the **no-duplicates** invariant is maintained.
5. **Implementation** — the source code of every implemented function, with
   brief comments. State the programming language used.
6. **Testing** — for each function, a table of test cases and results. Include
   the examples from [4task.md](4task.md) **and** your own edge cases (empty
   sets, disjoint sets, equal sets, string elements).
7. **Achieved tier** — state the highest tier you completed and which functions
   it covers (see the grading bands in [4task.md](4task.md)).
8. **Complexity** — the time complexity of your membership test and of each
   operation, with one sentence on how a built-in set type would improve it.
9. **Conclusions** — what was implemented, the difficulties encountered, and
   what you learned.

**Submission requirements.** The source files must compile/run and reproduce the
example outputs of [4task.md](4task.md). The language's built-in set type must
not appear anywhere in the submitted code.