Question 75. Sort Colors Solution 题目大意: 给一个数组排序,这个数组只有0,1,2三个元素,要求只遍历一遍 思路: 记两个索引,lowIdx初始值为0,highIdx初始值为nums.length - 1,遍历数组,如果是2就与highIdx处元素互换且highIdx-,如果是0就与lowIdx处元素互换且lowIdx++,i++,还剩一种情况就是1了,执行i++,循环结束条件是i<=highIdx Java实现: public void sortColors…

Given an array with n objects colored red, white or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, whit…

  75. Sort Colors   给定一个具有红色,白色或蓝色的n个对象的数组,将它们就地 排序,使相同颜色的对象相邻,颜色顺序为红色,白色和蓝色. 这里,我们将使用整数0,1和2分别表示红色,白色和蓝色. 注意:  您不应该使用库的排序功能来解决此问题. 例: 输入: [2,0,2,1,1,0]输出: [0,0,1,1,2,2] 跟进: 一个相当直接的解决方案是使用计数排序的两遍算法.首先,迭代0,1,和2的数组计数,然后覆盖总数为0的数组,然后是1,然后是2. 你能想出一个只使用恒定空…

一.题目说明 题目75. Sort Colors,给定n个整数的列表(0代表red,1代表white,2代表blue),排序实现相同颜色在一起.难度是Medium. 二.我的解答 这个是一个排序,还是简单的,代码如下: class Solution{ public: void sortColors(vector<int>& nums){ int num0=0,num1=0,num2=0; for(int i=0;i<nums.size();i++){ if(nums[i]==0)…

Sort Colors Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, w…

Given an array with n objects colored red, white or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, whit…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white a…

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 计数排序 双指针 日期 题目地址:https://leetcode.com/problems/sort-colors/description/ 题目描述 Given an array with n objects colored red, white or blue, sort them so that objects of the same col…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

Given an array with n objects colored red, white or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, whit…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

翻译 给定一个包括红色.白色.蓝色这三个颜色对象的数组.对它们进行排序以使同样的颜色变成相邻的,其顺序是红色.白色.蓝色. 在这里,我们将使用数字0.1和2分别来代表红色.白色和蓝色. 原文 Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, whit…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

Given an array with n objects colored red, white or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, whit…

解法一:计数排序:统计0,1,2 的个数 时间复杂度:O(n) 空间复杂度:O(k)    k为元素的取值范围, 此题为O(1) class Solution { public: void sortColors(vector<int>& nums) { ] = {}; //存放0,1,2三个元素的频率 ;i<nums.size();i++){ assert(nums[i] >= && nums[i]<=); //若不符合条件则报错 count[nums…

LeetCode 75. Sort Colors (python一次遍历,模拟三路快排) 题目分析: 本题需要实现数字只包含0,1,2的排序,并且要求一次遍历. 由于只用把数字隔离开,很容易想到快排的分割操作partition. 将三类数字隔离开,也就是模拟三路快排了. 解题思路 快排是选取哨兵p,将一段数组分成<p,=p,>p三类,并按这个顺序隔离开. 本题类似,哨兵为1,将一段数组分成0,1,2,即<1,=1,>1,并按这个顺序隔离开. 代码如下 class Solution:…

题目如下: 解题思路:我的解题思路是遍历数组,遇到0删除该元素并插入到数组头部,遇到1则不处理,遇到2删除该元素并插入到数组尾部. 代码如下: class Solution(object): def sortColors(self, nums): """ :type nums: List[int] :rtype: void Do not return anything, modify nums in-place instead. """ inx…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

题目: Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, an…

Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl…

  Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and…

要求 给只有0 1 2三个元素的数组排序 思路 方法1:遍历数组,利用辅助数组保存三个元素的个数,再写入(遍历两遍) 辅助数组有三个元素,对应0 1 2的个数 方法2:模拟三路快排,遍历一遍完成排序 三个索引,zero和two用于首尾的扩充,i用于遍历 遍历数组,每个元素只有三种可能 0 2移到首尾,1不动 实现 方法1 1 void sortColors(vector<int>& nums){ 2 int count[3] = {0}; 3 for( int i = 0 ; i &l…

75. 颜色分类 75. Sort Colors 题目描述 给定一个包含红色.白色和蓝色,一共 n 个元素的数组,原地对它们进行排序,使得相同颜色的元素相邻,并按照红色.白色.蓝色顺序排列. 此题中,我们使用整数 0. 1 和 2 分别表示红色.白色和蓝色. 注意: 不能使用代码库中的排序函数来解决这道题. 每日一算法2019/6/2Day 30LeetCode75. Sort Colors 示例: 输入: [2,0,2,1,1,0] 输出: [0,0,1,1,2,2] 进阶: 一个直观的解决方…

75. Sort Colors 问题描述: 给一个包含n个数字的数组,其中有0,1,2:排序使得所有相同的数字相邻,且按照0,1,2的顺序. 思路: (1)计数排序: 需要扫两遍数组,一遍统计个数,第二遍开始摆放数字. 代码如下: void sortColors(vector<int>& nums) { ,j=,k=; int n=nums.size(); ;p<n;p++) { ) i++; ) j++; else k++; } ;p<n;p++) { if(p<i…

1. Rotate List Given a list, rotate the list to the right by k places, where k is non-negative. Example: Given 1->2->3->4->5->NULL and k = 2, return 4->5->1->2->3->NULL. 思路:这题感觉有点没有说清楚,如果k大于了链表长度该怎么办呢?这个时候怎么确定旋转位置呢?从右往左数,超出数组…