摘要：有一个升序排序的数组． For example, Given sorted array , Your function should return length = , with the first five elements of nums being . It doesn't matter wh
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随笔分类 - Leetcode
摘要：Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., might become ). Write a function to determine if
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摘要：Given an integer $n$, generate a square matrix filled with elements from 1 to $n^2$ in spiral order. For example, Given n = 3, You should return the f
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摘要：Given an array of non negative integers, you are initially positioned at the first index of the array. Each element in the array represents your maxim
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摘要：Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example, Given the following matrix: You
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摘要：You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in place? 方阵顺时针旋转90度，
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摘要：Given an array of integers sorted in ascending order, find the starting and ending position of a given target value. Your algorithm's runtime complexi
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摘要：Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array whic
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摘要：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.
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摘要：Given an unsorted integer array, find the first missing positive integer. For example , Your algorithm should run in $O(n)$ time and uses constant spa
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摘要：Given an array of integers, (n = size of array), some elements appear twice and others appear once . Find all the elements that appear twice in this a
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摘要：Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., might become ). You are given a target value to
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摘要：Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted f
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摘要：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
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摘要：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
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摘要：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
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摘要：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
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摘要：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
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摘要：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
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摘要：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
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