LeetCode 75 Sort Colors 颜色分类(荷兰国旗)
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 int....
LeetCode 148. Sort List
DescriptionSort a linked list in O(n log n) time using constant space complexity.Example 1:Input: 4->2->1->3Output: 1->2->3->4Example 2:Input: -1->5->3->4->0Output: -1-&a...

LeetCode 75. Sort Colors
DescriptionGiven 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 ....

LeetCode 905. Sort Array By Parity
905. Sort Array By ParityGiven an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A.You may return any answer array tha....
【LeetCode1122】数组的相对排序(哈希or自定义sort)
一、题目二、方法一:哈希没错,,简单题,就是说将arr1中有arr2的元素,则按照arr2的元素先排列(特别注意:这里的arr2的元素都是不同的,但是arr1中是可以元素重复的),然后arr1中不是arr2的元素则被丢到arr1的尾巴。可以用哈希,用mp1记录arr1数组每种数字的出现次数,mp2记录arr2数组的是否出现,接着就是上面说的逻辑,,就是脑子清醒点,mp1[arr2[i]]这种东西....

[LeetCode] Wiggle Sort II 摆动排序
Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... Example: (1) Given nums = [1, 5, 1, 1, 6, 4], one possible answer is [1, 4, 1,...
[LeetCode] Wiggle Sort 摆动排序
Given an unsorted array nums, reorder it in-place such that nums[0] <= nums[1] >= nums[2] <= nums[3].... For example, given nums = [3, 5, 2, 1, 6, 4], one possible answer is [1, 6, 2, 5, 3, ....
[LeetCode] Sort Transformed Array 变换数组排序
Given a sorted array of integers nums and integer values a, b and c. Apply a function of the form f(x) = ax2 + bx + c to each elem...
[LeetCode] Sort Characters By Frequency 根据字符出现频率排序
Given a string, sort it in decreasing order based on the frequency of characters. Example 1: Input: "tree" Output: "eert" Explanation: 'e' appears twice while 'r' and 't' both appear once. So 'e' m...
[LeetCode] Sort List 链表排序
Sort a linked list in O(n log n) time using constant space complexity. 常见排序方法有很多,插入排序,选择排序,堆排序,快速排序,冒泡排序,归并排序,桶排序等等。。它们的时间复杂度不尽相同,而这里题目限定了时间必须为O(nlgn),符合要求只有快速排序,归并排序,堆排序,而根据单链表的特点,最适于用...
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