Exam_Rank_02_42_School

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Exam_Rank_02_42_School

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All 42 School Exam Rank 02 exercises — solved & explained (EN/ES), organized by level. 🚀

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# Exam Rank 02 — 42 School 📝🚀

**Every exercise that can appear in the 42 Common Core Exam Rank 02 — solved, explained, and organized by level.**

Each exercise ships with its original subject, a bilingual explanation (🇬🇧 English / 🇪🇸 Spanish), and a clean C solution written from scratch.

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</div>

---

## 📖 About

This repository gathers **all 56 functions and programs** that may show up in **Exam Rank 02** of the 42 Common Core, grouped by the four difficulty levels of the exam.

Every solution is written by me. If you are a 42 student, the best way to use this repo is simple: **read the subject, try to solve it yourself, and only then compare**. The goal is to learn the patterns — not to memorize answers.

> ⚠️ The real exam runs in a closed environment and grades you with the Moulinette. Use these solutions to **understand**, not to copy.

## 🗂️ Repository structure

The exam has 4 levels of increasing difficulty. Each exercise lives in its own folder:

```
Level_X/
└── exercise_name/
    ├── README.md       # Original subject (English)
    ├── spanish.md      # Explanation in Spanish 🇪🇸
    └── exercise.c      # My solution
```

## 📊 Progress — 56 / 56 ✅

| Level 1 🎫            | Level 2 🎫           | Level 3 🎫            | Level 4 🎫            |
|----------------------|----------------------|----------------------|----------------------|
| ✅ first_word        | ✅ alpha_mirror      | ✅ add_prime_sum     | ✅ flood_fill        |
| ✅ fizzbuzz          | ✅ camel_to_snake    | ✅ epur_str          | ✅ fprime            |
| ✅ putstr            | ✅ do_op             | ✅ expand_str        | ✅ ft_itoa           |
| ✅ ft_strcpy         | ✅ ft_atoi           | ✅ ft_atoi_base      | ✅ ft_list_foreach   |
| ✅ ft_strlen         | ✅ ft_strcmp         | ✅ ft_list_size      | ✅ ft_list_remove_if |
| ✅ ft_swap           | ✅ ft_strcspn        | ✅ ft_range          | ✅ ft_split          |
| ✅ repeat_alpha      | ✅ ft_strdup         | ✅ ft_rrange         | ✅ rev_wstr          |
| ✅ rev_print         | ✅ ft_strpbrk        | ✅ hidenp            | ✅ rostring          |
| ✅ rot_13            | ✅ ft_strrev         | ✅ lcm               | ✅ sort_int_tab      |
| ✅ rotone            | ✅ ft_strspn         | ✅ paramsum          | ✅ sort_list         |
| ✅ search_and_replace| ✅ is_power_of_2     | ✅ pgcd              |                      |
| ✅ ulstr             | ✅ last_word         | ✅ print_hex         |                      |
|                      | ✅ max               | ✅ rstr_capitalizer  |                      |
|                      | ✅ print_bits        | ✅ str_capitalizer   |                      |
|                      | ✅ reverse_bits      | ✅ tab_mult          |                      |
|                      | ✅ snake_to_camel    |                      |                      |
|                      | ✅ swap_bits         |                      |                      |
|                      | ✅ union             |                      |                      |
|                      | ✅ wdmatch           |                      |                      |

**🎯 Total pool: 56 functions / programs** — 12 (L1) · 19 (L2) · 15 (L3) · 10 (L4)

## 🚀 How to use it

1. **Pick an exercise** and open its `README.md` to read the subject.
2. **Solve it yourself first.** Build with the flags the exam uses:
   ```bash
   cc -Wall -Wextra -Werror your_solution.c
   ```
3. **Compare** your version with the provided solution and understand the differences.

## ⚡ Practice the real exam

Train under real conditions:

- 🖥️ [**42 Exam Simulator** (JCluzet)](https://github.com/JCluzet/42_EXAM) — recreates the exam environment locally.
- 🧪 [**Grademe**](https://grademe.fr) — online grader for individual exercises.

## 🤝 Contributing

Found a bug, a cleaner approach, or a missing edge case? Contributions are welcome — open an issue or a pull request.

## 📜 License

Released under the [MIT License](./LICENSE) — free to use, learn from, and share.

---

If this repo helped you pass, consider leaving a ⭐ — it helps other students find it.

Made with ☕ and a lot of `-Wall -Wextra -Werror` by [**Alex Higuera**](https://github.com/alexhiguera)

</div>

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