We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least L and at most R. Example :…

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 动态规划 暴力搜索+剪枝 线性遍历 日期 题目地址:https://leetcode.com/problems/number-of-subarrays-with-bounded-maximum/description/ 题目描述 We are given an array A of positive integers, and two positiv…

问题链接 LeetCode 795 题目解析 给定一个数组A,左右范围L.R.求子数组的数量,要求:子数组最大值在L.R之间. 解题思路 子数组必须连续,利用最大值R对数组进行分段,设定变量 left 记录每段开始位置(\(A[left] > R\),\(A[left+1] ≤ R\)),初始值为-1. 遍历数组,通过A[i]大小判断: 若 A[i] 在L.R之间,则 ans+=(i-j): 若 A[i] 大于R,则更改左界 left=i: 关键在于处理小于L的情况,由于需要子数组的最大值在L.…

We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least L and at most R. Example :…

We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least Land at most R. Example : I…

数学的方式 是对于所有的字符分成简单的三类 0 小于 L 1 LR 之间 2 大于R 也就是再求 不包含 2 但是包含1 的子数组个数 不包含2的子数组个数好求 对于连续的相邻的n个 非2类数 就有 n*(n-1)//2 + n 个连续子数组 但是包含1 的子数组个数不好求,这里求反 求不包含 包含1 不包含2 的 子数组个数 原理同上 (将1 类这时视为2类) 最后做差即可 dp A[i] 为以 i 结尾的满足条件的子数组个数 A[i] =A[i-1] 当A[i] 是第1类数 A[i] =pr…

Add Date 2014-09-23 Maximum Product Subarray 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 product = …

Given a circular array C of integers represented by A, find the maximum possible sum of a non-empty subarray of C. Here, a circular array means the end of the array connects to the beginning of the array.  (Formally, C[i] = A[i] when 0 <= i < A.leng…

Given an array with n integers, you need to find if there are triplets (i, j, k) which satisfies following conditions: 0 < i, i + 1 < j, j + 1 < k < n - 1 Sum of subarrays (0, i - 1), (i + 1, j - 1), (j + 1, k - 1) and (k + 1, n - 1) should be…

［抄题］: Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product. Example 1: Input: [2,3,-2,4] Output: 6 Explanation: [2,3] has the largest product 6. Example 2: Input: [-2…