two pointer

Описание: Struggling with LeetCode because every array problem turns into another ugly double loop? In this video, I’ll show you how the Two Pointers pattern can completely replace most of that brute-force pain.

We’ll start from scratch:

What two pointers actually mean (in simple English)

A real-life analogy so even a school kid can follow

When your brain should think “two pointers” instead of O(n²) brute force

Step‑by‑step walkthrough of the Two Sum / Two Sum II style problem using the two‑pointer approach

Dry run and intuition, not just code

This is Episode 01 of my pattern series here on Code On The Waves, where we focus on DSA patterns, LeetCode patterns, and interview problem‑solving, not just memorizing solutions. If you’re preparing for coding interviews, FAANG/product-based companies, or just want LeetCode to finally make sense, this video is for you.

⏱ What you’ll learn:

How to spot when a sorted array + pair sum screams “two pointers”

How to turn a double loop O(n²) solution into an O(n) two-pointers solution

Clean Python implementation you can reuse for many LeetCode questions

If this helped you understand the two pointers technique, drop a comment with the next pattern you want (sliding window, prefix sums, binary search on answer, etc.), and subscribe so you don’t miss the next pattern episodes.