原题：Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.Each number in...

“让我们面对它；总的来说数学是不容易的，但当你征服了问题，并达到新的理解高度，这就是它给你的回报。”——Danica McKellar数学是很难的学科，但因为它是科学家用数学来解释宇宙的语言，我们...

循环语句是一种很重要的结构，这种结构的特点就是在某种条件下，会重复循环执行某一段代码，直到条件不成立为止。这里的条件称为循环条件，重复执行的那段代码称为循环体。其实不只是C语言有循环语句，几乎所有语言都有循环语...

Two SumTotal Accepted: 262258Total Submissions: 1048169Difficulty: EasyGiven an array of integers, return indices of the two numbers such that they add up t...

Digital RootsTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 30962 Accepted Submission(s): 9508...

Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may ...

Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all u

Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path. Note: Yo...

Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4],...

Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example, given the following ...