https://www.compilemymind.com/tags/leetcode/ Recent content in Leetcode on Compile My Mind Hugo en Mon, 20 Jul 2026 19:30:00 +0300 https://www.compilemymind.com/posts/leetcode-two-sum-brute-force-hash-map/ Mon, 20 Jul 2026 07:06:49 +0300 https://www.compilemymind.com/posts/leetcode-two-sum-brute-force-hash-map/ <p>Two Sum asks for two distinct input positions whose values add to a target. The compact solution is often presented as a memorized hash-map trick, but the important reasoning is the complement equation: when the current value is x, the required earlier value is target minus x. From that observation, the implementation choice becomes a tradeoff between repeated search, sorting, and indexed lookup.</p> <p><figure> <img src="https://www.compilemymind.com/posts/leetcode-two-sum-brute-force-hash-map/concept-flow.svg" alt="Two Sum solution progression from brute force to hash map" width="1200" height="830" loading="lazy" decoding="async"> </figure></p>