题目描述: Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equal…

384. Shuffle an Array c++ random函数:https://www.jb51.net/article/124108.htm rand()不需要参数,它会返回一个从0到最大随机数的任意整数,最大随机数的大小通常是固定的一个大整数. 这样,如果你要产生0~10的10个整数,可以表达为: int N = rand() % 11; 这样,N的值就是一个0~10的随机数,如果要产生1~10,则是这样: 总结来说,可以表示为: a + rand() % n 其中的a是起始值,n是整…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

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 库函数 Fisher–Yates 洗牌 水塘抽样 日期 题目地址:https://leetcode.com/problems/shuffle-an-array/description/ 题目描述 Shuffle a set of numbers without duplicates. Example: // Init an array with se…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

［抄题］: Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equal…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

题目: Shuffle a set of numbers without duplicates. 分析: 对一组不包含重复元素的数组进行随机重排,reset方法返回最原始的数组,shuffle方法随机返回数组的一个排列, 并且使得获得数组每一个排列的概率都是相同的.为此,可以在初始化时,求出数组的所有排列.在使用shuffle方法时,随机返回全排列中的一个. 代码: public class Solution { //存储数组的所有排列 List<int[]> list = new Array…

1. shuffle算法: http://www.cnblogs.com/huaping-audio/archive/2008/09/09/1287985.html 注意:我们一般用的是第二种swap的方法:但是第一种直接选择,然后把最末尾一位填上的方法,也是很好的.只是会需要两倍的空间. 2. Random nextInt(bound)参数表示 0-inclusive,bound-exclusive: [0, bound) package com.company; import java.ut…

打乱一个没有重复元素的数组.示例:// 以数字集合 1, 2 和 3 初始化数组.int[] nums = {1,2,3};Solution solution = new Solution(nums);// 打乱数组 [1,2,3] 并返回结果.任何 [1,2,3]的排列返回的概率应该相同.solution.shuffle();// 重设数组到它的初始状态[1,2,3].solution.reset(); 详见:https://leetcode.com/problems/shuffle-an-a…

题目描述: Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal to the product of all the elements of nums except nums[i]. Solve it without division and in O(n). For example, given [1,2,3,4], return [24,12,8,…

题目描述: Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note:You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2. The number of elements…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

题目难度:Medium 题目: Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: The solution set must not contain duplicate quadrup…

LeetCode初级算法--设计问题01:Shuffle an Array (打乱数组) 搜索微信公众号:'AI-ming3526'或者'计算机视觉这件小事' 获取更多算法.机器学习干货 csdn:https://blog.csdn.net/baidu_31657889/ csdn:https://blog.csdn.net/abcgkj/ github:https://github.com/aimi-cn/AILearners 一.引子 这是由LeetCode官方推出的的经典面试题目清单~ 这…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally lik…

CREATE TABLE json_nested_test ( count string, usage string, pkg map<string,string>, languages array<string>, store map<string,array<map<string,string>>>) ROW FORMAT SERDE 'org.apache.hive.hcatalog.data.JsonSerDe' STORED AS TE…

Shuffling is a common process used with randomizing the order for a deck of cards. The key property for a perfect shuffle is that each item should have an equal probability to end up in any given index. In this lesson we discuss the concept behind th…

[LeetCode]659. Split Array into Consecutive Subsequences 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/split-array-into-consecutive-subsequences/description/ 题目描述: You are g…

这是悦乐书的第283次更新,第300篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第151题(顺位题号是665).给定一个包含n个整数的数组,您的任务是通过修改最多1个元素来检查它是否可以变为非递减.如果array [i] <= array [i + 1],且0 <= i <n,则我们定义一个数组是非递减的.例如: 输入:[4,2,3] 输出:true 说明:可以修改4为1或2以获得非递减数组. 输入:[4,2,1] 输出:false 说明:通过最多修改一个…

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 解题思路: 首先要理解,什么叫做height balanced BST Java for LeetCode 110 Balanced Binary Tree,然后就十分容易了,JAVA实现如下: public TreeNode sortedArrayToBST(int[] nums) { return…

384. 打乱数组 打乱一个没有重复元素的数组. 示例: // 以数字集合 1, 2 和 3 初始化数组. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // 打乱数组 [1,2,3] 并返回结果.任何 [1,2,3]的排列返回的概率应该相同. solution.shuffle(); // 重设数组到它的初始状态[1,2,3]. solution.reset(); // 随机返回数组[1,2,3]打乱后的结果. sol…

这是悦乐书的第184次更新,第186篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第43题(顺位题号是189).给定一个数组,将数组向右旋转k步,其中k为非负数.例如: 输入:[1,2,3,4,5,6,7],k = 3 输出:[5,6,7,1,2,3,4] 说明: 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] 输入:[ - 1,-100,3,99],k = 2 输出:[3,9…

Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. 解题思路一: 使用一个nums1Copy把nums1的前m个元素拷贝出来,然后把nums1Copy和nums2放进nums1中,JAVA实现如下: public void merge(int[] nums1, int m, int[] nums2, int n) { int[] nums1Copy=new int…

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-cn.com/problems/shuffle-the-array/ 题目描述 给你一个数组 nums ,数组中有 2n 个元素,按 [x1,x2,...,xn,y1,y2,...,yn] 的格式排列. 请你将数组按 [x1,y1,x2,y2,...,xn,yn] 格式重新排列,返回重排后的数组. 示例…

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 给一个排好序的数组,然后求搜索二叉树 其实就是二分法,不难. /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNo…

题目描述: 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 th…

题目描述: 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). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no…

题目描述: Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this in place with constant memory. For example, Given input arra…