求解数组中小于等于 k 的最大和:用 sum(0,i)表述数组 array 从 0 到 i的和,如果存在一个sum(0,j),j<\i,使得 sum(0,i)-sum(0,j)<=k;那么区间(j,i]就是一个有效的子区间;同时为了使得sum(0,i)-sum(0,j)这个值尽可能大,应当使得sum(0,j)尽可能小。 基本思路是,我们从左往右遍历数组 arr...
刷LeetCode,从数组开始。我们在刷题之前,先介绍下数组这种基础的数据结构。 1 基础数据结构:数组 array 数组是一种非常基础、常见的数据结构,在不同编程语言中都有重要的地位。数组也是LeetCode 题库中的第一类,包括很多 easy + medium 的题目,比如经典的第一题 TwoSum 两数之和。 数组的定义:将一组类型一致...
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: Input: matrix = [[1,0,1],[0,-2,3]], k = 2 Output: 2 Explanation: Because the sum of rectangle [[0, 1], [-2, 3]] is...
so in 2D matrix, we can sum up all values from row i to row j and create a 1D array to use 1D array solution. If col number is less than row number, we can sum up all values from col i to col j then use 1D array solution. */ Solution: 1publicclassSolution {2publicintmaxSu...
Once you are clear how to solve the above problem, the next step is to find the max sum no more than K in an array. This can be done within O(nlogn), and you can refer to this article:max subarray sum no more than k.
回顾leetcode原来做过的题,看到了经典的最大子序和问题,收藏了一个好回答。 这个问题是这样的(https://leetcode.com/problems/maximum-subarray/): Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. 就是给一组整...
Once you are clear how to solve the above problem, the next step is to find the max sum no more than K in an array. This can be done within O(nlogn), and you can refer to this article:max subarray sum no more than k.
File metadata and controls Preview Code Blame 31 lines (24 loc) · 1.55 KB Raw 2473. Max Sum of a Pair With Equal Sum of Digits Medium You are given a 0-indexed array nums consisting of positive integers. You can choose two indices i and j, such that i != j, a...
s.insert(curSum); } res=max(res, curMax); } }returnres; } }; 本文转自博客园Grandyang的博客,原文链接:最大矩阵和不超过K[LeetCode] Max Sum of Rectangle No Larger Than K,如需转载请自行联系原博主。
Can you solve this real interview question? Max Number of K-Sum Pairs - You are given an integer array nums and an integer k. In one operation, you can pick two numbers from the array whose sum equals k and remove them from the array. Return the maximu