标签：lan 分析 targe oat example discuss div float oid
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.
Example 1:
Input: [3,2,1,5,6,4] and k = 2
Output: 5
Example 2:
Input: [3,2,3,1,2,4,5,5,6] and k = 4
Output: 4
Note:
You may assume k is always valid, 1 ≤ k ≤ array‘s length.
代码：
1 class Solution: 2 def findKthLargest(self, nums, k) -> int: 3 # shuffle nums to avoid n*n 4 random.shuffle(nums) 5 return self.quickSelection(nums, 0, len(nums) - 1, len(nums) - k) 6 7 def quickSelection(self, nums, start, end, k): 8 if start > end: 9 return float(‘inf‘) 10 pivot = nums[end] 11 left = start 12 for i in range(start, end): 13 if nums[i] <= pivot: 14 # swip left and i 15 nums[left], nums[i] = nums[i], nums[left] 16 left += 1 17 nums[left], nums[end] = nums[end], nums[left] 18 if left == k: 19 return nums[left] 20 elif left < k: 21 return self.quickSelection(nums, left + 1, end, k) 22 else: 23 return self.quickSelection(nums, start, left - 1, k)
一个基于python的很好的分析：https://leetcode.com/problems/kth-largest-element-in-an-array/discuss/301338/Python-or-tm-215
11-215. Kth Largest Element in an Array
标签：lan 分析 targe oat example discuss div float oid
原文地址：https://www.cnblogs.com/tbgatgb/p/10952819.html
