Postorder
145. Binary Tree Postorder Traversal
public List<Integer> postorderTraversal(TreeNode root) { List<Integer> list = new ArrayList<>(); if (root == null) return list; Stack<TreeNode> stack ......
Binary Tree Postorder Traversal
Source Given a binary tree, return the postorder traversal of its nodes' values. Example Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Challe ......
1138 Postorder Traversal
题目： Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to ......