https://jeanphilogong.github.io/jeanblog/tags/in-place/Recent content in In-Place on Jeanphilo BlogHugo -- 0.168.0en-usMon, 20 Apr 2026 10:01:46 +0800https://jeanphilogong.github.io/jeanblog/alg/leetcode/hot100/binary-tree/114-flatten-binary-tree-to-linked-list/Mon, 20 Apr 2026 10:01:46 +0800https://jeanphilogong.github.io/jeanblog/alg/leetcode/hot100/binary-tree/114-flatten-binary-tree-to-linked-list/A practical guide to LeetCode 114 covering why the flattened list must follow preorder order and how reverse preorder with a prev pointer gives a stable in-place rewiring strategy.https://jeanphilogong.github.io/jeanblog/alg/leetcode/hot100/143-reorder-list/Tue, 10 Feb 2026 09:57:31 +0800https://jeanphilogong.github.io/jeanblog/alg/leetcode/hot100/143-reorder-list/Reorder a linked list to L0->Ln->L1->Ln-1... in O(n) time and O(1) extra space using split, reverse, and alternating merge, with derivation, pitfalls, and runnable multi-language implementations.