Coding Challenges
Pascal’s Triangle (LeetCode #118) – Explained Step by Step. Pascal’s Triangle is one of those problems that looks simple but hides powerful mathematical patterns. It’s a favorite on LeetCode (Problem #118), and a must-practice for interviews. Pascal’s Triangle is a…
Climbing Stairs (LeetCode 70): A Tiny Fibonacci in Disguise. A line‑by‑line walkthrough of a 4‑line Python solution, intuition, correctness, and faster alternatives. TL;DR The number of distinct ways to climb n steps when you can take 1 or 2 at…
Efficient Submatrix Sum Query Solutions: How to Solve Matrix Problems Asked in Google, Microsoft, and More. Introductions: This blog dives into an optimal approach for solving submatrix sum queries, a common problem in coding interviews at top tech companies like…
