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Techniques

• 25 Jul, 2025
• • Patterns

Two Pointers Algorithm - Intuition & Patterns

Week 0 notes on the two pointers technique: the 'squeeze' idea that kills a lot of nested loops, the two movement styles, and when to actually use it.

• 23 Jul, 2025
• • Patterns

Sliding Window Algorithm - Fixed & Variable Length

Week 0 notes on the sliding window: when to use it, fixed vs variable windows, and how it turns a lot of subarray and substring problems from O(n^2) into O(n).