Cheat sheets

Pick a topic for a quick reference.

• Big O notationWhat Big O is, time vs space, how n and h are used, with examples from the problems.
• Interview tipsPatterns, string problems, tokenization, TypeScript tips, pacing, and end questions.
• Two PointersOpposite-ends and two-iterables patterns, complexity, and common use cases from the LeetCode crash course.
• Sliding WindowDynamic and fixed-size windows, counting subarrays, and comparison with two pointers from the LeetCode crash course.