标识（Identifiers）
有效标识由字母(letter)，数字(digits)和下划线 ( _ )组成。标识的长度没有限制，但是有些编译器只取前32个字符（剩下的字符会被忽略）。
空格(spaces)，标点(punctuation marks)和符号(symbols) 都不可以出现在标识中。 只有字母(letters)，数字(digits) 和下划线(_)是合法的。并且变量标识必须以字母...
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编程语言 时间：
2016-05-19 10:48:29
阅读次数：
384
Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where "adjace ...
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其他好文 时间：
2016-05-18 10:24:35
阅读次数：
181
17: LCS Description Giving two strings consists of only lowercase letters, find the LCS(Longest Common Subsequence) whose all partition are not less t ...
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其他好文 时间：
2016-05-16 01:48:14
阅读次数：
159
Problem Description
In Diagon Alley ,there is only one Wand-seller,peeling gold letters over the door read Ollivanders: Makers of Fine Wands since 382 BC.A single wand lay on a faded purple cushion in...
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编程语言 时间：
2016-05-13 01:16:56
阅读次数：
258
Implement a trie with insert, search,
and startsWith methods.
Note:
You may assume that all inputs are consist of lowercase letters a-z.
在Trie树中主要有3个操作，插入、查找和删除。一般情况下Trie树中很少存在删除单独某个结点的情况，因此只...
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其他好文 时间：
2016-05-12 22:07:39
阅读次数：
328
题目：Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. You may assume that each word will contain only lower case le...
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其他好文 时间：
2016-05-12 16:35:27
阅读次数：
127
Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adja ...
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其他好文 时间：
2016-05-11 13:20:21
阅读次数：
158
Decode Ways
My Submissions
Question
Editorial Solution
Total Accepted: 68714 Total
Submissions: 391367 Difficulty: Medium
A message containing letters from A-Z is
being encod...
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其他好文 时间：
2016-05-07 11:28:01
阅读次数：
137
A message containing letters from A-Z is being encoded to numbers using the following
mapping:
'A' -> 1
'B' -> 2
...
'Z' -> 26
Given an encoded message containing digits, determine the total nu...
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其他好文 时间：
2016-05-07 11:02:55
阅读次数：
156
AnanagramsMost crossword puzzle fans are used to anagrams–groups of words with the same letters in different orders–for example OPTS, SPOT, STOP, POTS and POST. Some words however do not have this attr...
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其他好文 时间：
2016-05-07 10:41:09
阅读次数：
156
