Given an array A of integers, for each integer A[i] we need to choose either x = -K or x = K, and add x to A[i] (only once). After this process, we have some array B. Return the smallest possible difference between the maximum value of B and the mini…

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/smallest-range-ii/description/ 题目描述 Given an array A of integers, for each integer A[i] we need to choose either x = -K or x = K, and add…

Given an array A of integers, for each integer A[i] we need to choose either x = -K or x = K, and add x to A[i] (only once). After this process, we have some array B. Return the smallest possible difference between the maximum value of B and the mini…

很有意思的一道数学推理题目, 剪枝以后解法也很简洁.初看貌似需要把每个数跟其他数作比较.但排序以后可以发现情况大大简化:对于任一对元素a[i] < a[j], a[i] - k和a[j] + k 的情况可以排除, 因为会产生比原值更大的差, 所以对于原有数组的最小值min最大值max, (min - k, max + k)的情况可以排除.剩下的三种情况, (min - k, max - k), (min + k, max + k) 和 (min + k, max - k),后两种等价于原值max…

Given an array A of integers, for each integer A[i] we need to choose either x = -K or x = K, and add x to A[i] (only once). After this process, we have some array B. Return the smallest possible difference between the maximum value of B and the mini…

题目如下: 解题思路:我的思路是先找出最大值.对于数组中任意一个元素A[i]来说,如果A[i] + K 是B中的最大值,那么意味着从A[i+1]开始的元素都要减去K,即如果有A[i] + K >= A[-1] - K,那么A[i] + K 就可以作为最大值而存在:如果A[i] + K是最大值,那么最大的最小值是多少呢?因为A[i] 左边的元素都比A[i]小,所以其左边的元素都可以加上K,最大的最小值就会在 A[0] + K 和 A[i+1] - K 之间产生.遍历数组,计算每一个A[i] + K…

2020-01-21 21:43:52 问题描述: 问题求解: 这个题目还是有点难度的,感觉很巧妙也很难想到. 整体的思路如下: 1. 首先原问题等价于 +0 / + 2*K 2. 那么res = Max - Min 3. 不断更新Max,Min期望得到更小的res public int smallestRangeII(int[] A, int K) { int n = A.length; Arrays.sort(A); int max = A[0]; int min = A[0]; for (…

Given an array A of integers, for each integer A[i] we may choose any x with -K <= x <= K, and add x to A[i]. After this process, we have some array B. Return the smallest possible difference between the maximum value of B and the minimum value of B…

You have k lists of sorted integers in ascending order. Find the smallest range that includes at least one number from each of the k lists. We define the range [a,b] is smaller than range [c,d] if b-a < d-c or a < c if b-a == d-c. Example 1: Input:[…

You have k lists of sorted integers in ascending order. Find the smallest range that includes at least one number from each of the k lists. We define the range [a,b] is smaller than range [c,d] if b-a < d-c or a < c if b-a == d-c. Example 1: Input:[…