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编程之美之电话号码对应英语单词
题目一:根据电话上字母和数字的对应关系,用一个有意义的单词来表述一个电话号码,如用computer表示26678837 题目二:反过来,给定一个电话号码,是否可以用一个单词来表示呢?怎样表示最快呢?显然不是所有的电话号码都可以对应到单词上去 首先来看看leetcode上一个类似的题目: Letter Combinations of a Phone Number   G...
分类:其他好文   时间:2014-08-15 16:11:50    阅读次数:257
hdu 4929 Another Letter Tree(LCA+DP)
hdu 4929 Another Letter Tree(LCA+DP) 题意:有一棵树n个节点(n 解法:一个很直观的想法,求出lca(设其为w)后,枚举x,求出a到w的路径上,能匹配s0的x长度前缀的情况有多少种,令其为c[x]。再求出b到w的路径上能匹配s0的L-x(L表示s0的长度)长度后缀的情况有多少种,令其为d[l-x],那么将所有的c[x]*d[l-x](x属于[0,l]...
分类:其他好文   时间:2014-08-13 10:38:05    阅读次数:346
Topcoder SRM 627 div1 HappyLettersDiv1 : 字符串
Problem StatementThe Happy Letter game is played as follows: At the beginning, several players enter the field. Each player has a lowercase English le...
分类:移动开发   时间:2014-08-13 03:33:35    阅读次数:201
POJ 2608 Soundex 基础题题解
基本的编程能力考查。 注意: 1 下标处理 2 审查题意,并严格根据题意去重。 3 如何把代码写清晰精简。 #include #include const short MAX_LETTER = 21; const short ALP_LEN = 26; short Letter[ALP_LEN] = {-1, 1, 2, 3, -1, 1, 2, -1, -1, 2, 2, 4, 5...
分类:其他好文   时间:2014-08-06 14:58:32    阅读次数:238
Letter Combinations of a Phone Number
Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon...
分类:其他好文   时间:2014-08-06 14:30:21    阅读次数:213
Word Ladder II leetcode java
题目:Given two words (start and end), and a dictionary, find all shortest transformation sequence(s) from start to end, such that:Only one letter can b....
分类:编程语言   时间:2014-08-06 01:52:30    阅读次数:251
Word Ladder leetcode java
题目: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...
分类:编程语言   时间:2014-08-06 01:35:30    阅读次数:389
POJ 3356 AGTC (编辑距离 DP)
Description Let x and y be two strings over some finite alphabet A. We would like to transform x into y allowing only operations given below: Deletion: a letter in x is missing in y at a corr...
分类:其他好文   时间:2014-08-05 19:32:50    阅读次数:247
The Most Wanted Letter
The Most Wanted LetterYou are given a text, which contains different english letters and punctuation symbols. You should find the most frequent letter...
分类:其他好文   时间:2014-08-05 10:41:10    阅读次数:276
Python break continue pass语句day06
Pythonbreak语句Pythonbreak语句,就像在C语言中,打破了最小封闭for或while循环。break语句用来终止循环语句,即循环条件没有False条件或者序列还没被完全递归完,也会停止执行循环语句。break语句用在while和for循环中。如果您使用嵌套循环,break语句将停止执行最深层的循环..
分类:编程语言   时间:2014-08-05 03:11:59    阅读次数:403
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