Hot100: Binary Tree Inorder Traversal (Recursion / Stack ACERS Guide)
Subtitle / Summary Binary tree traversal is the starting point of most tree templates, and inorder traversal is one of the cleanest problems for understanding both recursive thinking and explicit stack simulation. This ACERS guide uses LeetCode 94 to explain the left-root-right order, the iterative stack template, and why the pattern matters in real engineering work. Reading time: 10-12 min Tags: Hot100, binary tree, DFS, stack, inorder traversal SEO keywords: Hot100, Binary Tree Inorder Traversal, inorder traversal, explicit stack, LeetCode 94 Meta description: A systematic guide to LeetCode 94 from recursion to explicit stacks, with engineering scenarios and runnable multi-language implementations. Target Readers Hot100 learners who want to lock in a stable tree-traversal template Developers moving from arrays and linked lists to trees, and still mixing up preorder, inorder, and postorder Engineers who want to reuse the left-root-right idea in BSTs, expression trees, or syntax trees Background / Motivation Inorder traversal is not hard by itself, but its training value is high: ...