problem0144

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Published: Sep 11, 2020 License: MIT Imports: 1 Imported by: 0

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144. Binary Tree Preorder Traversal

题目

Given a binary tree, return the preorder traversal of its nodes' values.

For example: Given binary tree {1,#,2,3},

   1
    \
     2
    /
   3

return [1,2,3].

Note: Recursive solution is trivial, could you do it iteratively?

解题思路

见程序注释

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type TreeNode

type TreeNode = kit.TreeNode

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