You can rotate the array by x = 3 positions to begin on the the element of value 3: [3,4,5,1,2]. Example 2: Input:nums = [2,1,3,4]Output:falseExplanation:There is no sorted array once rotated that can make nums. Example 3: Input:nums = [1,2,3]Output:trueExplanation:[1,...
LeetCode上牵扯到Rotated Sorted Array问题一共有四题,主要是求旋转数组的固定值或者最小值,都是考察二分查找的相关知识。在做二分查找有关的题目时,需要特别注重边界条件和跳出条件。在做题的过程中,不妨多设几个测试案例,自己判断一下。 下面是这四题的具体解答。 33.Search in Rotated Sorted Array 在求旋转...
一、33. Search in Rotated Sorted Array Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e.,0124567might become4567012). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no duplicate exists...
How and why? Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2). Find the minimum element. The array may contain duplicates. 这道题是Search in Rotated Sorted Array的扩展,思路在Find Minimum in Rotated Sort...
题目链接:https://leetcode.com/problems/search-in-rotated-sorted-array/题目: Suppose a sorted array is rotated at some pivot unknown to you beforehand. 0 1 2 4 5 6 7might become4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, ...
[ 4 5 6 7 1 2 3] ,如果 target = 2,那么数组可以看做 [ -inf -inf - inf -inf 1 2 3]。 和解法一一样,我们每次只关心 mid 的值,所以 mid 要么就是 nums [ mid ],要么就是 inf 或者 -inf。 什么时候是 nums [ mid ] 呢?
mid > start : 最小值在左半部分。 mid < start: 最小值在左半部分。 无论大于还是小于,最小值都在左半部分,所以 mid 和start 比较是不可取的。 mid 和end 比较 mid < end:最小值在左半部分。 mid > end:最小值在右半部分。 所以我们只需要把 mid 和end 比较,mid < end 丢弃右半部分(更新 en...
46. Check for pair with a specified sum in rotated array Write a Java program to check whether there is a pair with a specified sum in a given sorted and rotated array. Click me to see the solution 47. Find rotation count in a sorted rotated array ...
This is a follow up problem toSearch in Rotated Sorted Array, wherenumsmay contain duplicates. Would this affect the run-time complexity? How and why? 代码: BinarySearch方法: classSolution:defsearch(self,nums,target):""" :type nums: List[int] ...
153. Find Minimum in Rotated Sorted Array Suppose an array sorted in ascending order 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. ...