Given a set of words (without duplicates), find all word squares you can build from them. A sequence of words forms a valid word square if the kth row and column read the exact same string, where 0 ≤ k < max(numRows, numColumns). For example, the wor…

Given a set of words (without duplicates), find all word squares you can build from them. A sequence of words forms a valid word square if the kth row and column read the exact same string, where 0 ≤ k < max(numRows, numColumns). For example, the wor…

其他LeetCode题目欢迎访问:LeetCode结题报告索引 LeetCode:Word Ladder Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end, such that: Only one letter can be changed at a time Each intermediate word…

话说博主在写Max Chunks To Make Sorted II这篇帖子的解法四时,写到使用单调栈Monotone Stack的解法时,突然脑中触电一般,想起了之前曾经在此贴LeetCode All in One 题目讲解汇总(持续更新中...)的留言区中说要写单调栈的总结帖,当时答应了要写,就去LeetCode上看标记为Stack的题,可是发现有好多题,而且很多用的不是单调栈,于是博主一个一个的看了起来,但是无奈太多了,一直没有时间全部看完,就一直没有动笔写.虽说时间就像那啥,挤挤总会有的…

[leetcode]Word Ladder II @ Python 原题地址:http://oj.leetcode.com/problems/word-ladder-ii/ 参考文献:http://blog.csdn.net/doc_sgl/article/details/13341405   http://chaoren.is-programmer.com/ 题意:给定start单词,end单词,以及一个dict字典.要求找出start到end的所有最短路径,路径上的每个单词都要出现在dict…

题意 略 分析 0.如果直接暴力1000^5会TLE,因此考虑剪枝 1.如果当前需要插入第i个单词,其剪枝如下 1.1 其前缀(0~i-1)已经知道,必定在前缀对应的集合中找 – 第一个词填了ball 后,第二个词必须以a开头 – 第二个词填了area后,第三个词必须以le开头 – 以其他开头的就没必要搜下去了 1.2 第i+1~n-1的单词,必定是以对应位置的0~i-1的前缀+nextWord[k]作为前缀 - 第一个词填了ball – 第二个词想填area的话 – 字典中必须有以le la开…

Description Given a set of words without duplicates, find all word squares you can build from them. A sequence of words forms a valid word square if the kth row and column read the exact same string, where 0 ≤ k < max(numRows, numColumns). For exampl…

Given a set of words (without duplicates), find all word squares you can build from them. A sequence of words forms a valid word square if the kth row and column read the exact same string, where 0 ≤ k < max(numRows, numColumns). For example, the wor…

[LeetCode]228. Summary Ranges 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/summary-ranges/description/ 题目描述: Given a sorted integer array without duplicates, return the summary of its ranges. Example 1: Input: [0,1,2,4,5,7] Outp…

Design and implement a data structure for Least Frequently Used (LFU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1. s…