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全部文章（共33篇）

LeetCode: 102. Binary Tree Level Order Traversal

LeetCode: 102. Binary Tree Level Order Traversal 题目描述 Given a binary tree, return the level order traversal of its nodes’ values. (ie, from left to ...

leetcode

2018-03-22

0 444

LeetCode: 103. Binary Tree Zigzag Level Order Traversal

LeetCode: 103. Binary Tree Zigzag Level Order Traversal 题目描述 Given a binary tree, return the zigzag level order traversal of its nodes’ values. (ie,...

leetcode

2018-03-23

0 428

LeetCode: 105. Construct Binary Tree from Preorder and Inorder Traversal

LeetCode: 105. Construct Binary Tree from Preorder and Inorder Traversal 题目描述 Given preorder and inorder traversal of a tree, construct the binary t...

leetcode

2018-03-23

0 571

LeetCode: 106. Construct Binary Tree from Inorder and Postorder Traver

LeetCode: 106. Construct Binary Tree from Inorder and Postorder Traver 题目描述 Given inorder and postorder traversal of a tree, construct the binary tr...

leetcode

2018-03-24

0 490

LeetCode: 111. Minimum Depth of Binary Tree

LeetCode: 111. Minimum Depth of Binary Tree 题目描述 Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the sh...

leetcode

2018-03-28

0 413

LeetCode: 109. Convert Sorted List to Binary Search Tree

LeetCode: 109. Convert Sorted List to Binary Search Tree 题目描述 Given a singly linked list where elements are sorted in ascending order, convert it to...

leetcode linkedlist tree binary tree BST

2018-03-26

0 404

LeetCode: 112. Path Sum

LeetCode: 112. Path Sum 题目描述 Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along t...

leetcode

2018-03-28

0 405

LeetCode: 124. Binary Tree Maximum Path Sum

LeetCode: 124. Binary Tree Maximum Path Sum 题目描述 Given a binary tree, find the maximum path sum. For this problem, a path is defined as any sequenc...

Leetcode algorithm

2018-04-07

0 637

LeetCode: 125. Valid Palindrome

LeetCode: 125. Valid Palindrome 题目描述 Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. ...

leetcode palindrome

2018-04-08

0 431

LeetCode: 126. Word Ladder II

LeetCode: 126. Word Ladder II 最近工作和毕设压力比较大，刷 LeetCode 有点不在状态，代码可能有点难看。不过，整体的思路应该是没有问题的。题目描述 Given two words (beginWord and endWord), and a d...

leetcode

2018-04-11

0 569