数组-Kth Largest Element in an Array(找出第K大的数)
来源:互联网 发布:c语言中define的用法 编辑:程序博客网 时间:2024/05/16 14:19
题目描述;
Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element.
For example,
Given [3,2,1,5,6,4]
and k = 2, return 5.
Note:
You may assume k is always valid, 1 ≤ k ≤ array's length.
思考:
找出第k大的数,那就是第N-k+1小的数了,采用快速排序,时间复杂程度为O(nlogN)
代码:
public class Solution {public static int findKthLargest(int[] nums, int k) {int n = nums.length;int site = n - k + 1;if(n == 0){return 0;}return find(nums, site - 1, 0, n - 1);}public static int find(int[] nums, int site, int left, int right){int res = 0;if(left <= right){int base = nums[left];int l = left;int r = right;while(l < r){while(nums[r] >= base && l < r){r--;}if(l < r){nums[l] = nums[r];l++;}while(nums[l] <= base && l < r){l++;}if(l < r){nums[r] = nums[l];r--;}}nums[r] = base;if(r == site){res = base;}else if(r> site){int left1 = left;int right1 = r -1;res = find(nums, site, left1, right1);}else{int left2 = r + 1;int right2 = right;res = find(nums, site, left2, right2);}}return res;}}
0 0
- 数组-Kth Largest Element in an Array(找出第K大的数)
- 第二周:215. Kth Largest Element in an Array(找出第K大的数)
- [LeetCode] Kth Largest Element in an Array (找出数组的第k大的元素)
- Kth Largest Element in an Array 数组中的第K大的数
- 215. Kth Largest Element in an Array(数组中第k大的数字)
- 【Top K 问题】[Leetcode-215] Kth Largest Element in an Array 数组中第K大的数
- LeetCode 二分查找第K大的数215. Kth Largest Element in an Array
- Leetcode 215 Kth Largest Element in an Array 数组中第k大的元素
- LeetCode OJ 之 Kth Largest Element in an Array(数组中的第k大元素)
- Kth Largest Element in an Array(数组中第K大元素)
- 215. Kth Largest Element in an Array(数组中第k大元素)
- 【LeetCode-面试算法经典-Java实现】【215-Kth Largest Element in an Array(数组中第K大的数)】
- leetcode 215:Kth Largest Element in an Array ( 分治-求第k小的数,第k大的数)
- 【LeetCode】215. Kth Largest Element in an Array找第K大的元素
- LeetCode 215. Kth Largest Element in an Array(第K大元素)
- leetcode解题之215. Kth Largest Element in an Array java 版(第k大的数字)
- leetcode215---Kth Largest Element in an Array(第k大元素)
- 字符串算法——查找数组第K个最大值( Kth Largest Element in an Array)
- 【GOF23设计模式】_适配器模式、对象适配器、类适配器、开发中场景JAVA235
- String Date Calendar之间的转换
- 数据库学习地图
- SICP 练习1.35使用不动点发寻找黄金分割律
- 我对“Hello World”30年的爱恨情仇
- 数组-Kth Largest Element in an Array(找出第K大的数)
- Ubuntu系统GNOME Classic中alt+table无效
- Qt中设置窗体大小的方法
- 近期科技类1
- JAVA回调机制(CallBack)详解
- 进程调度算法
- C++第7次作业
- 以生活例子说明单线程与多线程
- ubuntu 安装mysql环境(离线压缩包方式)