Index Placement on Jeanphilo Bloghttps://shio-chan-dev.github.io/jeanblog/tags/index-placement/Recent content in Index Placement on Jeanphilo BlogHugo -- 0.159.2en-usTue, 10 Feb 2026 10:25:53 +0800Hot100: First Missing Positive In-Place Index Placement ACERS Guidehttps://shio-chan-dev.github.io/jeanblog/alg/leetcode/hot100/41-first-missing-positive/Tue, 10 Feb 2026 10:25:53 +0800https://shio-chan-dev.github.io/jeanblog/alg/leetcode/hot100/41-first-missing-positive/Find the first missing positive in O(n) time and O(1) extra space using in-place index placement (value x should be placed at index x-1), with engineering mapping, pitfalls, and runnable multi-language implementations.