First, iterate the array counting number of 0's, 1's, and 2's, then overwrite array with total number of 0's, then 1's and followed by 2's. Could you come up with an one-pass algorithm using only constant space? public class Solution { public void sortColors(int[] nums) {//m...
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 blue respectively. void sort...
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, white, and blue respectively. No...
merge(left_half, right_half) def merge(self, left, right): # 初始化一个空的已排序数组 sorted_array = [] # 初始化左右两部分的指针 i = j = 0 # 遍历两个数组,每次循环将较小的元素添加到已排序数组中 while i < len(left) and j < len(right): if left[i] < right[j]: sorted_arra...
The values at odd indices 1 and 3 are sorted in non-increasing order. Sort the values at even indices of nums in non-decreasing order. For example, if nums = [4,1,2,3] before this step, it becomes [2,1,4,3] after. The values at even indices 0 and 2 are sorted in non-...
One element (red) is removed from the input data and inserted in-place into the sorted list with each iteration. Example 1: Input: head = [4,2,1,3] Output: [1,2,3,4] Example 2: Input: head = [-1,5,3,4,0] Output: [-1,0,3,4,5] Constraints: The number of nodes in...
util.Arrays; public class ShellSort { public static void main(String []args) { int []arr ={1,4,2,7,9,8,3,6}; sort(arr); System.out.println(Arrays.toString(arr)); } public static void sort(int []arr) { // 增量gap,并逐步缩小增量 for(int gap = arr.length/2; gap > 0; ...
这道题也可以用一次三路快排。数组分为 3 部分,第一个部分都是 0,中间部分都是 1,最后部分都是 2 。 参考代码 packageleetcodefuncsortColors(nums[]int){zero,one:=0,0fori,n:=rangenums{nums[i]=2ifn<=1{nums[one]=1one++}ifn==0{nums[zero]=0zero++}}} ...
The vowels are'a','e','i','o', and'u', and they can appear in lowercase or uppercase. Consonants comprise all letters that are not vowels. Example 1: Input: s = "lEetcOde" Output: "lEOtcede" Explanation: 'E', 'O', and 'e' are the vowels in s; 'l', 't', 'c', and...
package leetcode import ( "sort" ) func frequencySort(s string) string { if s == "" { return "" } sMap := map[byte]int{} cMap := map[int][]byte{} sb := []byte(s) for _, b := range sb { sMap[b]++ } for key, value := range sMap { cMap[value] = append(cMap[va...