CodingNinja

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Two Sum looks simple. That’s why most people underestimate it. But the real value isn’t the answer — it’s the thinking process behind it: how you optimize, reason about complexity, and choose data structures. This is where real algorithm skill starts. youtu.be/WB2SZ3_QK28

LeetCode now requires a phone number to post articles 🤔 I’d rather not share mine, so I moved my posts to Medium—but it’s a bit clunky… Any better blogging platforms you recommend? @indy0214_19547/intuition-2ddcf50d881f" target="_blank" rel="nofollow noopener">medium.com/@indy0214_1954…

LeetCode 643 Maximum Average Subarray I | Sliding Window Explained youtu.be/tDuxicyKNXg

LeetCode 463. Island Perimeter | No BFS Needed! youtu.be/a9k7dXTOcvc

today's daily question youtu.be/jihhD6vmJyA

System Design Vol.2 youtu.be/Hz6r4QiAtsQ

I was actually asked this question in a real interview in the past. LeetCode 409: Longest Palindrome youtu.be/WpYAmcWKu7o

Next Greater Element I A beginner-friendly explanation that actually makes sense 👇 youtu.be/W44bZsslWcg

System Design Framework I personally use is here!! youtu.be/moV8Tt99CB8

LeetCode 412 Fizz Buzz The animations and script are made in the same style as my infrastructure videos — like networking, databases, and servers — and the narration for those parts is read by AI. The coding section, though, is still my own voice 😄 youtu.be/Ls56-SWwWdM

Big O notation youtu.be/uZNNxvnKEXM

Find All Disappeared Numbers - LeetCode 448 | Master This Array Problem Fast! youtu.be/Ah1lu73-Yv4

My YouTube membership count is getting close to 200!!

Just uploaded a solution for an easy problem—check it out! About 150 people joined my membership—thank you! A 1-year membership is like a cup of coffee and gives ad-free access to medium+ videos. Your support means a lot! youtu.be/YsRiS4xqUso

Lately, people who once left the membership keep coming back! I’m happy to see them return—but if they’re coming back anyway, I wish they’d just stay 😅

Two Sum IV - Input is a BST - leetcode 653 | Stop Overthinking, Try This youtu.be/rXD5Yt43Oro

Binary Tree Postorder Traversal youtu.be/uvWHVJOHz9w

Bought a new monitor this year. My son just ended its career 😭

Next Greater Element I - LeetCode 496 | Stop Overthinking, Try This youtu.be/W44bZsslWcg