Hướng dẫn và Quy định khi viết lời giải
Guidelines and Rules for Writing Solutions
## Guidelines
- When writing a solution for a problem, navigate to the problem's page and find the link to the solution in the bottom right corner.
- Use Markdown to write your solution. Learn more about Markdown [here](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax). Note that not all syntax from the link above is supported.
- Write mathematical formulas using LaTeX, enclosed in dollar signs.
- Once submitted, your solution will be reviewed immediately. If your solution is rejected, you may edit it based on feedback and resubmit it for review.
- _If you encounter difficulties, join the Discord server and contact the admins for guidance_.
## Rules
### To ensure the quality of solutions, some updated rules include:
- You need at least 50 points to write a solution.
- Use professional, objective language.
- Ensure that the solution does not contain excessive content unrelated to the problem.
- The solution **must** be formatted. For example, "given array a, and n elements" will not be accepted. The correct format is "Given array $a$ and $n$ elements", or "Given array `a` and `n` elements" (prefer the first option as it is easier to read).
- The solution must include the main idea to solve the problem. If possible, break it into several smaller hints.
- For certain problems, it is necessary to prove the correctness of the algorithm.
- The solution should not narrate the algorithm verbatim, and should avoid using terms specific to a programming language when possible (e.g., `vector` in C++).
- Except for simple problems, solutions **MUST NOT** contain sample code, only **PSEUDO-CODE**.
