1.题目描述 2.题目分析 在数组的首尾各加入INT_MIN ,然后遍历数组. 3.代码 int findPeakElement(vector<int>& nums) { ) ; nums.insert( nums.begin(), INT_MIN ); nums.push_back( INT_MIN ); ; it != nums.end() - ; ++it ){ ) && *it > *(it-) ) ); } }…

[LeetCode]162. Find Peak Element 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/find-peak-element/description/ 题目描述: A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], fi…

A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the peaks is fi…

Find Peak Element A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. You may imagine that num[-1] = num[n] = -∞. For example, in array [1, 2, 3, 1],…

A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the peaks is fi…

Find Peak Element A peak element is an element that is greater than its neighbors. Given an input array nums, where nums[i] ≠ nums[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to…

根据题目可知,输入为:一个相邻元素不相等的数列,输出为:其中一个(上)峰值的序号.并且要求时间复杂度为logn 分析:由于题目要求时间复杂度为logn,因此不能进行全部遍历.又因为只需要找到其中的一个峰值,那么,每次对半分,便可以达到logn的复杂度. 根据对半分的思路继续想,不难发现只要确定了中间位置的数是处在上升阶段还是下降阶段,就可以确定在某一侧必有一个峰值. 往复多次,即可找出两个点,其中一个一定处于某一个峰值上. java代码: public int findPeakElement(i…

原题链接在这里:https://leetcode.com/problems/find-peak-element/ 题目: A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks…

A peak element is an element that is greater than its neighbors. Given an input array nums, where nums[i] ≠ nums[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the pea…

A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the peaks is fi…