Data Structures course files

Place course files in this directory and link to them from _pages/data-structures.md.

Suggested naming:

• slides-01-introduction.pdf
• slides-02-linear-lists.pdf
• assignment-01.pdf
• assignment-01-template.zip

Example link for _pages/data-structures.md:

<a href="/files/data-structures/slides-01-introduction.pdf">下载 PDF</a>