https://shio-chan-dev.github.io/jeanblog/zh/tags/lca/Recent content in LCA on Jeanphilo BlogHugo -- 0.161.1zh-cnSun, 19 Apr 2026 14:52:28 +0800https://shio-chan-dev.github.io/jeanblog/zh/alg/leetcode/hot100/binary-tree/236-lowest-common-ancestor-of-a-binary-tree/Sun, 19 Apr 2026 14:52:28 +0800https://shio-chan-dev.github.io/jeanblog/zh/alg/leetcode/hot100/binary-tree/236-lowest-common-ancestor-of-a-binary-tree/围绕 LeetCode 236 讲清最近公共祖先的后序返回值语义：子树返回什么、什么时候当前节点成为答案、以及为什么节点自己也可以是祖先。