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[LeetCode] Intersection of Two Linked Lists
Intersection of Two Linked ListsWrite a program to find the node at which the intersection of two singly linked lists begins.For example, the following two linked lists:A: &nbs...
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[LeetCode] Find Peak Element
Find Peak ElementA peak element is an element that is greater than its neighbors.Given an input array where num[i] ≠ num[i+1], find a peak element and return its index.The array may contain multi...
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[LeetCode] Excel Sheet Column Title
Excel Sheet Column TitleGiven a positive integer, return its corresponding column title as appear in an Excel sheet.For example: 1 -> A 2&n...
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[LeetCode] Majority Element
Majority ElementGiven an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.You may assume that the array is non-empty ...
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[LeetCode] Factorial Trailing Zeroes
Factorial Trailing ZeroesGiven an integer n, return the number of trailing zeroes in n!.Note: Your solution should be in logarithmic time complexity.解题思路：n!=2^x*3^y*5^z...，注意到一个2和一个5贡献一...
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[LeetCode] Excel Sheet Column Number
Excel Sheet Column NumberRelated to question Excel Sheet Column TitleGiven a column title as appear in an Excel sheet, return its corresponding column number.For example: A...
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[LeetCode] Repeated DNA Sequences
Repeated DNA SequencesAll DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated ...
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[LeetCode] Largest Number
Largest NumberGiven a list of non negative integers, arrange them such that they form the largest number.For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330.Note: The ...
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[LeetCode] Binary Search Tree Iterator
Binary Search Tree IteratorImplement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Calling next() will return the next smallest n...
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[LeetCode] Min Stack
Min Stack Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.push(x) -- Push element x onto stack.pop() -- Removes the element on top of the stack.to...
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[LeetCode] Number of Islands
Number of IslandsGiven a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands...
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[LeetCode] Rotate Array
Rotate ArrayRotate an array of n elements to the right by k steps.For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6...
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[LeetCode] House Robber
House RobberYou are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that ad...
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[LeetCode] Reverse Bits
Reverse BitsReverse bits of a given 32 bits unsigned integer.For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), return 964176192 (represented in binary...
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[LeetCode] Number of 1 Bits
Number of 1 BitsWrite a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight).For example, the 32-bit integer ’11' has binar...
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查看磁盘文件夹大小工具WinDirStat
WinDirStat是一个巨牛的工具，能够查看每个文件夹占用空间大小。便于清理文件。官方链接为：https://windirstat.info/ 同时也有Linux版（http://kdirstat.sourceforge.net/）的和Mac版的（http://www.derlien.com/、http://grandperspectiv.sourceforge.net/）
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SqlServer数据库比对工具 Open DBDiff
两个数据库merge的时候，若有一个可视化的工具该多好呀。早有人想到这点，于是有了Open DBDiff。链接地址：https://opendbiff.codeplex.com/这个工具能够比对表格模式、表格数据。但是有几个不足之处：（1）若表数据太多，加载的时候可能会出现错误。并且不能按特定条件加载数据（2）数据匹配时，merge的规则是比较索引是否相同，不能自定义merge规则。（3）比对数据...
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[LeetCode] Search Insert Position
Search Insert PositionGiven a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.You may assume no duplic...
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2015年04月02日阿里笔试总结
每次写简历的时候感觉自己很牛逼，每次面试和笔试的时候，却发现自己很搓逼，今天阿里笔试再次被鄙视！感觉要学的东西太多了啊。1. 函数lg(ax^2-8x+a-6)的值域为R，那么实数a的取值范围为A. [0, 8] B.[-2, 8]C. (0, 8]D.(-2, 8]E.(-2, +无穷)F.[8, +无穷)尼玛，这不是高中的题目吗？全忘了有不有？静下心来分析一下，函数的值域为R，那么ax^2-8...
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[LeetCode] Binary Tree Right Side View
Binary Tree Right Side ViewGiven a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom.For example:Given the...
