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Valid Sudoku
一、 题目 数独游戏,每一行,每一列,每一个小方格中含有数字1-9且不重复,不要求数字全部出现,可以用’.’代替。判断给出方格的是否符合要求。 二、 分析 第一次玩这个游戏,不知道规则,搜之,原来就是要遍历判断,那就查询每一行,每一列,每一个方格啦!主要的技巧是在判断方格时,可以使用一个四重for循环,优化后使用一个三重循环。 class Solution { public: bo...
分类:其他好文   时间:2015-02-16 16:58:45    阅读次数:154
Valid Parentheses
https://oj.leetcode.com/problems/valid-parentheses/Given a string containing just the characters'(',')','{','}','['and']', determine if the input stri...
分类:其他好文   时间:2015-02-15 20:30:40    阅读次数:183
【KMP】Period
KMP算法Next[]函数深入理解,Next[]当前字符前匹配字符数,串长n-Next[i]=串内循环子串的长度p。本题求子循环串内循环节数。Problem DescriptionFor each prefix of a given string S with N characters (each ...
分类:其他好文   时间:2015-02-15 16:25:23    阅读次数:137
【LeetCode从零单排】No58.Length of Last Word
题目Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.If the last word does not exist, return 0.Note: A word is defined...
分类:其他好文   时间:2015-02-15 10:46:47    阅读次数:120
[ruby]rubyGem出现ERROR: Could not find a valid gem时的处理方法
场景: 想安装SASS的时候,打开cmd,输入gem install sass的时候却出现了: ERROR: Could not find a valid gem 'sass' (>= 0), here is why: Unable to download data from .... ...
分类:其他好文   时间:2015-02-15 08:18:57    阅读次数:679
PAT1050. String Subtraction
Given two strings S1 and S2, S = S1 - S2 is defined to be the remaining string after taking all the characters in S2 from S1. Your task is simply to c...
分类:其他好文   时间:2015-02-14 16:11:18    阅读次数:107
PAT1084. Broken Keyboard
On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc...
分类:其他好文   时间:2015-02-14 16:08:30    阅读次数:177
[leetcode]Longest Substring Without Repeating Characters
Longest Substring Without Repeating Characters 解题过程。
分类:其他好文   时间:2015-02-14 12:14:20    阅读次数:117
hadoop报错:Does not contain a valid host:port authority
今天用sbin/start-yarn.sh启动yarn的时候,遇到下面的错误java.lang.IllegalArgumentException: Does not contain a valid host:port authority: master at org.apache.hadoop.ne...
分类:其他好文   时间:2015-02-13 19:46:12    阅读次数:217
【LeetCode从零单排】No36 Valid Sudoku
题目      判断数独是否成立的一道题,看的是某大神的答案,写的太漂亮了。Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with the charact...
分类:其他好文   时间:2015-02-13 18:38:44    阅读次数:114
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