Question: Find the contiguous subarray within an array (containing at least one number) that has the largest sum. For example, given the array [2, 1, –3, 4, –1, 2, 1, –5, 4], The contiguous array [4, –1, 2, 1] has the largest sum = 6. 此问题提供了两种解决方案,首先…

Subarray Sum Given an integer array, find a subarray where the sum of numbers is zero. Your code should return the index of the first number and the index of the last number. Example Given [-3, 1, 2, -3, 4], return [0, 2] or [1, 3]. 用hashmap来存从nums[0…

Given an integer array, find a subarray where the sum of numbers is zero. Your code should return the index of the first number and the index of the last number. Example Given [-, , , -, ], , ] or [, ]. Note There is at least one subarray that it's s…

Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k. Example 1: Input:nums = [1,1,1], k = 2 Output: 2 Note: The length of the array is in range [1, 20,000]. The range of numbers…

Given a list of non-negative numbers and a target integer k, write a function to check if the array has a continuous subarray of size at least 2 that sums up to the multiple of k, that is, sums up to n*k where n is also an integer. Example 1: Input:…

Given an nonnegative integer array, find a subarray where the sum of numbers is k. Your code should return the index of the first number and the index of the last number. Example Given , return [2, 4]. 题解1 - 哈希表 题 Zero Sum Subarray | Data Structure a…

Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k. Example 1: Input:nums = [1,1,1], k = 2 Output: 2 Note: The length of the array is in range [1, 20,000]. The range of numbers…

2018-07-08 13:24:31 一.525. Contiguous Array 问题描述: 问题求解: 我们都知道对于subarray的问题,暴力求解的时间复杂度为O(n ^ 2),问题规模已经给出是50000量级,显然只能是O(n),至多O(nlogn)的复杂度. 本题使用DP和滑动数组都比较棘手,这才是最麻烦的地方,我们知道一般来说对于subarray的问题,dp和滑动数组是两大利器,但是本题这两个最实用的解法都不再适用,那么该如何解决呢? 其实想通了就是一个很简单的问题,本题是lo…

In computer science, the maximum subarray problem is the task of finding the contiguous subarray within a one-dimensional array of numbers which has the largest sum. For example, for the sequence of values −2, 1, −3, 4, −1, 2, 1, −5, 4; the contiguou…

Given a non-empty 2D matrix matrix and an integer k, find the max sum of a rectangle in the matrix such that its sum is no larger than k. Example: Given matrix = [ [1, 0, 1], [0, -2, 3] ] k = 2 The answer is 2. Because the sum of rectangle [[0, 1], […