subarray专题

Subarray Sum Equals K

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 = 2Output: 2 思路:用prefixsum prefixsu

Maximum Length of Repeated Subarray

Given two integer arrays A and B, return the maximum length of an subarray that appears in both arrays. Example 1: Input:A: [1,2,3,2,1]B: [3,2,1,4,7]Output: 3Explanation: The repeated subarray

leetcode209. Minimum Size Subarray Sum

题目 Given an array of positive integers nums and a positive integer target, return the minimal length of a subarray whose sum is greater than or equal to target. If there is no such subarray, return 0

Leetcode83: Maximum Subarray

Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4], the contiguous subarray [4,−1,2,1] h

leetcode Maximum Subarray 最大子序列

Maximum Subarray  Total Accepted: 28381 Total Submissions: 83696 My Submissions Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example

LeetCode—Divide and Conquer--53. Maximum Subarray

问题:https://leetcode.com/problems/maximum-subarray/?tab=Description Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array

Leetcode 3171. Find Subarray With Bitwise AND Closest to K

Leetcode 3171. Find Subarray With Bitwise AND Closest to K 1. 解题思路2. 代码实现 题目链接:3171. Find Subarray With Bitwise AND Closest to K 1. 解题思路 这道题坦率地说让我感觉很挫败,又一次没有自力搞定,是看了大佬们的答案才搞定的…… 知道比没有搞定更难受的是什么吗?是连

leetcode oj java 53. Maximum Subarray

一、问题描述: Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4], the contiguous subarray [4,

**Leetcode 209. Minimum Size Subarray Sum | 区间和符合条件 = k

https://leetcode.com/problems/minimum-size-subarray-sum/description/ O(n)可解 class Solution {public:int minSubArrayLen(int s, vector<int>& nums) {if (nums.size()==0 || s == 0) return 0;int cur = num

leetcode 53. Maximum Subarray(分治,递归)

找到中间位置,所求子串不是在中间位置的左边,就是右边,还有中间位置两边。中间位置左边右边的和最大的子串可以递归地求得,再求中间位置往左挨个加的最大和以及中间位置往右挨个数的最大和,这两个和就是子串跨越中间位置时的最大和; 这三个最大和中的最大值就是所求最大值。 这道题好像在剑指offer见过额 package leetcode53MaximumSubarray;import ja

Maximum Subarray(最大子序列和)

给定一个整数数组 nums ,找到一个具有最大和的连续子数组(子数组最少包含一个元素),返回其最大和。 示例: 输入: [-2,1,-3,4,-1,2,1,-5,4],输出: 6解释: 连续子数组 [4,-1,2,1] 的和最大,为 6。 1.思路:初始化dp[0] = nums[0],dp[i] = max{dp[i] + nums[i] , nums[i]}, max(dp[i])

152. Maximum Product Subarray dynamic programming

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest pr

leetcode53-Maximum Subarray

题目 给你一个整数数组 nums ,请你找出一个具有最大和的连续子数组(子数组最少包含一个元素),返回其最大和。 子数组 是数组中的一个连续部分。 示例 1: 输入:nums = [-2,1,-3,4,-1,2,1,-5,4] 输出:6 解释:连续子数组 [4,-1,2,1] 的和最大,为 6 。 分析 求连续子数组的和,我们可以用一个变量cur记录连续子数组的最大和,当cur加上当前元素比

LeetCode *** 53. Maximum Subarray

题目: Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4], the contiguous subarray [4,−1,2,1]

Maximum subarray problem(“最大和子数组”问题)与Kadane’s algorithm

最大和子串:在计算机科学中,最大子数组问题就是在给定一维数组中寻找和最大的连续的子数组,并确定起点索引i,终点索引j和最大和。(该定义翻译自wikipedia)                                                            最直接的方法就是穷举每一个子串计算和:暴力搜索1(Brute force) def findMaxSum(arr)

hdu 5869 Different GCD Subarray Query 预处理 + 离线

// hdu 5869 Different GCD Subarray Query 预处理 + 离线//// 题目链接://// http://acm.split.hdu.edu.cn/showproblem.php?pid=5869//// 题目大意://// 给定数组,求[L,R]段中所有子段的不同gcd的种类//// 解题思路:////

Codeforces 1187 D. Subarray Sorting —— 线段树,贪心

This way 题意: 现在有两个数组,并且你每次可以做一个操作:选择一个区间,并且排序。 问你对上面这个数组做一些操作之后是否能得到下面这个数组。 题解: 那么如果每次选的区间大小为2,那么就像是一个冒泡排序了,将一个大的值依次向后传并且保持其他的值顺序不变。 那么我们只需要从后往前枚举一遍b数组,然后查看a数组对应的bi的值的最后一个位置到n的最大值是否有一个数大于他。如果有就不行

LeetCode 152 Maximum Product Subarray (思维)

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest p

leetcode-53:Maximum Subarray

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LeetCode Maximum Subarray和编程之美 求数组的子数组之和的最大值

Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4], the contiguous subarray [4,−1,2,1] h

[LeetCode]53.Maximum Subarray

【题目】 Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4], the contiguous subarray [4,−1,

1【算法】——最大子数组问题(maximum subarray)

一.问题描述         假如我们有一个数组,数组中的元素有正数和负数,如何在数组中找到一段连续的子数组,使得子数组各个元素之和最大。 二.问题分析 分治法求解: 初始状态: low=0;high=A.length-1;mid=(low+high)/2; 求解A的最大子数组,A[i,j],有以下三种情况: 完全位于A[low,mid]完全位于A[mid+1,high]跨越中点 1

Leetcode 3026. Maximum Good Subarray Sum

Leetcode 3026. Maximum Good Subarray Sum 1. 解题思路2. 代码实现 题目链接:3026. Maximum Good Subarray Sum 1. 解题思路 这一题的话主要就是要快速遍历所有的good subarray并快速获得每一个good subarray的和的最大值。 因此,问题就主要就成了两个问题: 如何快速找到所有的good suba

LeetCode862. Shortest Subarray with Sum at Least K——单调队列

文章目录 一、题目二、题解 一、题目 Given an integer array nums and an integer k, return the length of the shortest non-empty subarray of nums with a sum of at least k. If there is no such subarray, return -

LeetCode小白菜笔记[13]:Maximum Subarray

LeetCode小白菜笔记[13]:Maximum Subarray 53. Maximum Subarray [easy] 题目如下: Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the

LeetCode907. Sum of Subarray Minimums——单调栈

文章目录 一、题目二、题解 一、题目 Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may be large, return the answer modulo 109