倒转数组 Leetcode189 记录调整数组顺序而不需要另加内存的一种方法: 题目 189. 旋转数组 给定一个数组,将数组中的元素向右移动 k 个位置,其中 k 是非负数. 示例 1: 输入: [1,2,3,4,5,6,7] 和 k = 3输出: [5,6,7,1,2,3,4]解释:向右旋转 1 步: [7,1,2,3,4,5,6]向右旋转 2 步: [6,7,1,2,3,4,5]向右旋转 3 步: [5,6,7,1,2,3,4] 示例 2: 输入: [-1,-100,3,99] 和 k =…

1.关于leetcode 这是第一篇关于leetcode的题解,就先扯点关于leetcode的话. 其实很早前就在博客园看到过leetcode一些题解,总以为跟一般OJ大同小异,直到最近点开了一篇博文Leetcode 编程训练,无意间点进leetcode的主页看了下,乖乖,居然能用JavaScript提交代码(还能用python.ruby等)!瞬间来了兴趣,一口气把几十道水题都切完了,代码放在了github,有兴趣的可以参考或者帮忙review一下.对于个人认为有意思的题目,楼主也会时不时地写些…

Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note:Try to come up as many solutions as you can, there are at least 3 different ways to solve this pro…

#189.    Rotate Array Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note: Try to come up as many solutions as you can, there are at least 3 different…

Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to the right: [6,7,1,2,3,4…

public class Solution { public void reverse(int[] nums, int start, int end) { while (start < end) { int temp = nums[start]; nums[start] = nums[end]; nums[end] = temp; start++; end--; } } public void Rotate(int[] nums, int k) { k %= nums.Length; rever…

Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note: Try to come up as many solutions as you can, there are at least 3 different ways to solve this pr…

方法 4:使用反转算法 这个方法基于这个事实:当我们旋转数组 k 次, k\%nk%n 个尾部元素会被移动到头部,剩下的元素会被向后移动. 在这个方法中,我们首先将所有元素反转.然后反转前 k 个元素,再反转后面 n-kn−k 个元素,就能得到想要的结果. 假设 n=7n=7 且 k=3k=3 . 原始数组 : 1 2 3 4 5 6 7反转所有数字后 : 7 6 5 4 3 2 1反转前 k 个数字后 : 5 6 7 4 3 2 1反转后 n-k 个数字后 : 5 6 7 1 2 3 4 --…

题目描述 解法一: /** * @param {number[]} nums * @param {number} k * @return {void} Do not return anything, modify nums in-place instead. - 不要返回任何内容,而是在适当的位置修改nums. */ var rotate = function(nums, k) { let length = nums.length let tailArr = nums.slice(length…

今天什么都没发生 ================================================= leetcode118 https://leetcode.com/problems/pascals-triangle/?tab=Description leetcode169 https://leetcode.com/problems/majority-element/?tab=Description leetcode189 https://leetcode.com/proble…

189. 旋转数组 LeetCode189. Rotate Array 题目描述 给定一个数组,将数组中的元素向右移动 k 个位置,其中 k 是非负数. 示例 1: 输入: [1,2,3,4,5,6,7] 和 k = 3 输出: [5,6,7,1,2,3,4] 解释: 向右旋转 1 步: [7,1,2,3,4,5,6] 向右旋转 2 步: [6,7,1,2,3,4,5] 向右旋转 3 步: [5,6,7,1,2,3,4] 示例 2: 输入: [-1,-100,3,99] 和 k = 2 输出:…