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全部文章（共243篇）

LeetCode:129. Sum Root to Leaf Numbers

LeetCode:129. Sum Root to Leaf Numbers 题目描述 Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. A...

2018-04-17

0 393

LeetCode: 128. Longest Consecutive Sequence

LeetCode: 128. Longest Consecutive Sequence 题目描述 Given an unsorted array of integers, find the length of the longest consecutive elements sequence. ...

2018-04-16

0 544

LeetCode: 127. Word Ladder

LeetCode: 127. Word Ladder 题目描述 Given two words (beginWord and endWord), and a dictionary’s word list, find the length of shortest transformation se...

2018-04-12

0 446

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

0 589

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

0 433

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

0 642

LeetCode: 123. Best Time to Buy and Sell Stock III

LeetCode: 123. Best Time to Buy and Sell Stock III 题目大意 Say you have an array for which the ith element is the price of a given stock on day i. Des...

2018-04-06

0 647

KMP 算法(Knuth–Morris–Pratt algorithm)的基本思想

KMP 算法(Knuth–Morris–Pratt algorithm)的基本思想阅读本文之前，您最好能够了解 KMP 算法解决的是什么问题，最好能用暴力方式（Brute Force）解决一下该问题。 KMP 算法主要想解决的是文本搜索的问题: 给定一个模式字符串 p 和一个子串 t， ...

2018-04-05

0 556

LeetCode: 122. Best Time to Buy and Sell Stock II

LeetCode: 122. Best Time to Buy and Sell Stock II 题目描述 Say you have an array for which the ith element is the price of a given stock on day i. Desi...

2018-04-05

0 661

LeetCode: 121. Best Time to Buy and Sell Stock

LeetCode: 121. Best Time to Buy and Sell Stock 题目描述 Say you have an array for which the ith element is the price of a given stock on day i. If you ...

2018-04-05

0 449