示例 2: 输入: nums = [1,2,1,3,5,6,4] 输出: 1 或 5 解释: 你的函数可以返回索引 1,其峰值元素为 2:   或者返回索引 5, 其峰值元素为 6. 说明: 你的解法应该是 O(logN) 时间复杂度的. 二分法: 如果中间的是峰值直接返回,如果不是,那么两边较大的那一侧是存在峰值的. class Solution { public: int findPeakElement(vector<int>& nums) { int len = nums.siz…

题目 寻找峰值 你给出一个整数数组(size为n),其具有以下特点: 相邻位置的数字是不同的 A[0] < A[1] 并且 A[n - 2] > A[n - 1] 假定P是峰值的位置则满足A[P] > A[P-1]且A[P] > A[P+1],返回数组中任意一个峰值的位置. 样例 给出数组[1, 2, 1, 3, 4, 5, 7, 6]返回1, 即数值 2 所在位置, 或者6, 即数值 7 所在位置. 注意 数组可能包含多个峰值,只需找到其中的任何一个即可 解题 直接遍历 Java…

峰值元素是指其值大于左右相邻值的元素.给定一个输入数组,其中 num[i] ≠ num[i+1],找到峰值元素并返回其索引.数组可能包含多个峰值,在这种情况下,返回到任何一个峰值所在位置都可以.你可以想象得到  num[-1] = num[n] = -∞.例如,在数组 [1, 2, 3, 1]中 3 是峰值元素您的函数应该返回索引号2.注意:你的解决方案应该是对数复杂度的. 详见:https://leetcode.com/problems/find-peak-element/descriptio…

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…

1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, in that case return the index to any one of the peaks i…

二分法相关 153. Find Minimum in Rotated Sorted Array 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). Find the minimum element. You may assume no duplicate exists in the array. (M…

Leetcode之二分法专题-162. 寻找峰值(Find Peak Element) 峰值元素是指其值大于左右相邻值的元素. 给定一个输入数组 nums,其中 nums[i] ≠ nums[i+1],找到峰值元素并返回其索引. 数组可能包含多个峰值,在这种情况下,返回任何一个峰值所在位置即可. 你可以假设 nums[-1] = nums[n] = -∞. 示例 1: 输入: nums = [1,2,3,1] 输出: 2 解释: 3 是峰值元素,你的函数应该返回其索引 2. 示例 2: 输入:…

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…

162. 寻找峰值 162. Find Peak Element 题目描述 峰值元素是指其值大于左右相邻值的元素. 给定一个输入数组 nums,其中 nums[i] ≠ nums[i+1],找到峰值元素并返回其索引. 数组可能包含多个峰值,在这种情况下,返回任何一个峰值所在位置即可. 你可以假设 nums[-1] = nums[n] = -∞. 每日一算法2019/6/1Day 29LeetCode162. Find Peak Element 示例 1: 输入: nums = [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…