Maximal Subarray Sum : O(n) scan-and-update dynamic programming, https://en.wikipedia.org/wiki/Maximum_subarray_problem, https://leetcode.com/problems/maximum-subarray Maximal Submatrix Sum: given 2-D matrix, find the submatrix whose sum is largestwe…

Given an integer matrix, find a submatrix where the sum of numbers is zero. Your code should return the coordinate of the left-up and right-down number. Example Given matrix [ [1 ,5 ,7], [3 ,7 ,-8], [4 ,-8 ,9], ] return [(1,1), (2,2)] 分析: 本质上还是subarr…

和为零的子矩阵 给定一个整数矩阵,请找出一个子矩阵,使得其数字之和等于0.输出答案时,请返回左上数字和右下数字的坐标. 样例 给定矩阵 [ [1 ,5 ,7], [3 ,7 ,-8], [4 ,-8 ,9], ] 返回 [(1,1), (2,2)] 挑战 O(n3) 时间复杂度 解题 直接暴露求解,时间复杂度O(N2*M2 ) public class Solution { /** * @param matrix an integer matrix * @return the coordinat…

Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K. If there is no non-empty subarray with sum at least K, return -1. Example 1: Input: A = [1], K = 1 Output: 1 Example 2: Input: A = [1,2], K = 4 Output: -1 Exa…

Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K. If there is no non-empty subarray with sum at least K, return -1. Example 1: Input: A = [1], K = 1 Output: 1 Example 2: Input: A = [1,2], K = 4 Output: -1 Exa…

Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K. If there is no non-empty subarray with sum at least K, return -1. Example 1: Input: A = [1], K = 1 Output: 1 Example 2: Input: A = [1,2], K = 4 Output: -1 Exa…

用python中的numpy包的时候不小心踩了array和matrix的大坑,又引申一下比较list array matrix之间的异同.数据结构(Data Structures)基本上人如其名——它们只是一种结构,能够将一些数据聚合在一起.换句话说,它们是用来存储一系列相关数据的集合.Python 中有四种内置的数据结构——列表(List).元组(Tuple).字典(Dictionary)和集合(Set). 1.list list可以明显和array.matrix区分,list通过[ ]申明,…

Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K. If there is no non-empty subarray with sum at least K, return -1. Example 1: Input: A = [1], K = 1 Output: 1 Example 2: Input: A = [1,2], K = 4 Output: -1 Exa…

总结一下"入门3R"(Reading, 'Riting, 'Rrithmetic)中的读和写,不同的数据结构下的读写还是有点区别的. vector 命名 12 month.days<-c(31,28,31,30,31,30,31,31,30,31,30,31)names(month.days)<-month.name 操作文本 1.文本分离 12 pangram<-"The quick brown fox jumps over the lazy dog&qu…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 队列 日期 题目地址:https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/ 题目描述 Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K.…