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Given a matrix, if an element is , set its entire row and column to . Do it in place. 重点是空间复杂度限制为常数． 人家想法： 用 matrix 的第０行和第０列的元素分别记录所对应的行和列是否有０． 比较特殊，我 阅读全文
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Given an array of integers, are there elements in such that ? Find all unique triplets in the array which gives the sum of zero. Note: The solution se 阅读全文
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给一个非负数组A,元素们是A[i], i=0,...,n 1. 索引i代表x坐标,值A[i]表示高度.索引i与A[i],既(i, A[i])表示了垂直于x轴的线段. 请找出两条线段,与x轴组成的桶最多能装多少水? 人家想法: 先从底最宽搜起．两个边找最矮的移动，计算容积，保留最大值，循环条件 lef 阅读全文
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Follow up for "153. Find Minimum in Rotated Sorted Array": What if duplicates are allowed? Would this affect the run time complexity? How and why? Sup 阅读全文
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Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., might become ). Find the minimum element. You ma 阅读全文
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Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots they w 阅读全文
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Given an integer array, find three numbers whose product is maximum and output the maximum product. Example 1: Example 2: Note: 1. The length of the g 阅读全文
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Given an array consisting of $n$ integers, find the contiguous subarray of given length $k$ that has the maximum average value. And you need to output 阅读全文
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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. 阅读全文
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Given an array of 2n integers, your task is to group these integers into n pairs of integer, say $(a_1, b_1), (a_2, b_2), ..., (a_n, b_n)$ which makes 阅读全文