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…

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:…

  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…

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…