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RSS订阅原创 LeetCode刷题记录（第十六天）
Next Greater Element I原题目：You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1's elements in the corres...
2018-04-09 22:27:54
266
原创 LeetCode刷题记录（第十五天）
Reshape the Matrix原题目：In MATLAB, there is a very useful function called 'reshape', which can reshape a matrix into a new one with different size but keep its original data.You're given a matrix repres...
2018-04-04 23:42:33
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原创 LeetCode刷题记录（第十四天）
Toeplitz Matrix原题目：A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same element.Now given an M x N matrix, return True if and only if the matrix is Toeplitz.翻译：如果从左上角到右下角的...
2018-04-03 22:19:44
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原创 LeetCode刷题记录（第十三天）
Island Perimeter原题目：You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The...
2018-04-02 23:34:19
214
原创 LeetCode刷题记录（第十二天）
Distribute Candies原题目：Given an integer array with even length, where different numbers in this array represent different kinds of candies. Each number means one candy of the corresponding kind. You ne...
2018-04-01 22:04:54
182
原创 LeetCode刷题记录（第十一天）
Baseball Game原题目：You're now a baseball game point recorder.Given a list of strings, each string can be one of the 4 following types:Integer (one round's score): Directly represents the number of point...
2018-03-31 20:38:33
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原创 LeetCode刷题记录（第十天）
Fizz Buzz原题目：Write a program that outputs the string representation of numbers from 1 to n.But for multiples of three it should output “Fizz” instead of the number and for the multiples of five output...
2018-03-30 23:15:32
196
原创 LeetCode刷题记录（第九天）
Keyboard Row原题目：Given a List of words, return the words that can be typed using letters of alphabet on only one row's of American keyboard like the image below.翻译后：给定一个单词列表，只返回可在美式键盘的一行上使用字母表输入的单词，如下图...
2018-03-29 23:52:28
176
原创 LeetCode刷题记录（第八天）
Reverse Words in a String III昨天是悲剧的一天，发烧加加班，天气热的太快了，唉。原题目：Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word ...
2018-03-28 20:02:31
190
原创 LeetCode刷题记录（第七天）
Number Complement原题目：Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation.Note:The given integer is guaranteed to fit within...
2018-03-26 23:13:51
141
原创 mongodb的安装与配置
mongodb的安装与配置在公司一直使用的是redis，对redis虽然不是非常精通，但还是会使用redis的，而且因为公司在用，以后肯定会越来越熟练的，所以现在也学一学mongodb，因为前几天有人问过我关于mongodb的东西，但是以前只是在学校的课程中学习过一点，都忘记了，所以再从头学一边，记好笔记。一、mongodb的好处：1、无数据结构的限制： 1）、没有表结构的概念，每条记录都可...
2018-03-26 19:52:37
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原创 LeetCode刷题记录（第六天）
Swap Salary这道题竟然是一个sql题，虽然经常写sql和看关于mysql的性能优化，但是我发现一个大问题，我都白学来。。。。题目：Given a table salary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f valu...
2018-03-25 22:22:54
798
原创 LeetCode刷题记录（第六天）
Self Dividing Numbers关于昨天题目遗留的问题，原谅我还是没有学会，答案中给了四种方法，虽然意思都理解的差不多，但是答案的代码给的c++版，看完以后还是一脸懵逼，不知道昨天为什么出来一道难度hard的题目，我这种小白easy都吃力，竟然找死写一道只有37%人写出解决方案的难题。。。。不过确实是锻炼脑子，已经死了一半的脑细胞了。。。。今天美好的周六，在公司加了一天的班，晚上竟然还做...
2018-03-24 23:56:42
154
原创 LeetCode刷题记录（第五天）
Trapping Rain Water原题目：Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.翻译后：给定n个非负整数来表示每个柱的宽度为1的高程图...
2018-03-23 23:52:14
554
原创 LeetCode刷题记录（第四天）
Reverse String原题目：Write a function that takes a string as input and returns the string reversed.这个直接我自己翻译了：写出一个方法输入一个字符串并且把它反着返回。（看来我英语还不错）事例：Example:Given s = "hello", return "olleh".思路：这个题还是非常简单的，主要...
2018-03-22 23:53:34
314
原创 LeetCode刷题记录（第三天）
Judge Route Circle原题目：Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place.The move sequen...
2018-03-21 23:42:25
219
原创 LeetCode刷题记录（第二天）
Hamming Distance原题目：The Hamming distance between two integers is the number of positions at which the corresponding bits are different.Given two integers x and y, calculate the Hamming distance.翻译后：两个...
2018-03-20 23:56:59
175
翻译 常用的正则表达式字符含义
\ 将下一个字符标记为一个特殊字符、或一个原义字符、或一个 向后引用、或一个八进制转义符。例如，'n' 匹配字符 "n"。'\n' 匹配一个换行符。序列 '\\' 匹配 "\" 而 "\(" 则匹配 "("。 ^ 匹配输入字符串的开始位置。如果设置了 RegExp 对象的 Multiline 属性，^ 也匹配 '\n' 或 '\r' 之后的位置。 $ 匹配输入字符串的结束...
2018-03-19 23:28:20
400
原创 LeetCode刷题记录（第一天）
Jewels and Stones原题目：You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in Sis a type of stone you have. You want to know...
2018-03-19 23:23:58
880
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