摘要：Given a binary tree, return the inorder traversal of its nodes' values. For example:Given binary tree{1,#,2,3}, return[1,3,2]. Note: Recursive solutio 阅读全文

摘要：Given a binary tree, return the preorder traversal of its nodes' values. For example:Given binary tree{1,#,2,3}, return[1,2,3]. Note: Recursive soluti 阅读全文