摘要：
Given a binary tree, find the length of the longest path where each node in the path has the same value. This path may or may not pass through the roo 阅读全文
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[LeetCode] 148. Sort List_Middle tag: Linked List
2019-05-02 11:11 by Johnson_强生仔仔, 217 阅读, 收藏,
摘要：
Sort a linked list in O(n log n) time using constant space complexity. Example 1: Input: 4->2->1->3 Output: 1->2->3->4 Example 2: Input: -1->5->3->4-> 阅读全文
[LeetCode] 206. Reverse Linked List_Easy tag: Linked List
2019-04-30 03:14 by Johnson_强生仔仔, 217 阅读, 收藏,
摘要：
Reverse a singly linked list. Example: Follow up: A linked list can be reversed either iteratively or recursively. Could you implement both? 很基本的一道换顺序 阅读全文
[LeetCode] 680. Valid Palindrome II_Easy tag: Two Pointers
2018-08-15 00:24 by Johnson_强生仔仔, 217 阅读, 收藏,
摘要：
Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome. Example 1: Example 2: Note: 题目思路就是正常的用tw 阅读全文
[LeetCode] 367. Valid Perfect Square_Easy tag:Math
2018-08-21 13:32 by Johnson_强生仔仔, 216 阅读, 收藏,
摘要：
Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library functio 阅读全文
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