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 双数组 参考资料 日期 题目地址:https://leetcode.com/problems/longest-mountain-in-array/description/ 题目描述 Let's call any (contiguous) subarray B (of A) a mountain if the following properties…

题目如下: 解题思路:本题的关键是找出从升序到降序的转折点.开到升序和降序,有没有联想的常见的一个动态规划的经典案例--求最长递增子序列.对于数组中每一个元素的mountain length就是左边升序的子序列长度加上右边降序的左序列长度.对于右边降序,如果我们遍历数组,那么降序就是升序.那么我们要做的就是,分别正序和倒序遍历数组,求出每个元素的左边和右边升序的子序列长度,那么这个长度的和就是答案.如下图,我们分别用两个数组保持正序和逆序遍历时候,每个元素在当前所属的递增子序列中的长度位置,如果…

[LeetCode]697. Degree of an Array 解题报告 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/degree-of-an-array/description/ 题目描述: Given a non-empty array of non-negative integers nums, the degree of this array is defined as the maximum frequency of…

[LeetCode]522. Longest Uncommon Subsequence II 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/longest-uncommon-subsequence-ii/description/ 题目描述: Given a list of strings, you…

原题链接在这里:https://leetcode.com/problems/longest-mountain-in-array/ 题目: Let's call any (contiguous) subarray B (of A) a mountain if the following properties hold: B.length >= 3 There exists some 0 < i < B.length - 1 such that B[0] < B[1] < ...…

Difficulty: Hard  More:[目录]LeetCode Java实现 Description Given a string S, find the length of the longest substring T that contains at most two distinct characters.For example,Given S = “eceba”,T is "ece" which its length is 3. Intuition 方法一:假设有一个…

[题目] Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no d…

[Description] Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target,…

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 日期 题目地址:https://leetcode.com/problems/valid-mountain-array/description/ 题目描述 Given an array A of integers, return true if and only if it is a valid mountain array. Recall that…

题目如下: Given an array A of integers, return true if and only if it is a valid mountain array. Recall that A is a mountain array if and only if: A.length >= 3 There exists some i with 0 < i < A.length - 1 such that: A[0] < A[1] < ... A[i-1] &…