Given an integer array nums and an integer k, return the kth largest element in the array.
Note that it is the kth largest element in the sorted order, not the kth distinct element.
Example 1:
Input: nums = [3,2,1,5,6,4], k = 2 Output: 5
Example 2:
Input: nums = [3,2,3,1,2,4,5,5,6], k = 4 Output: 4
Constraints:
1 <= k <= nums.length <= 104-104 <= nums[i] <= 104
Solution: Quick selection
Time complexity: O(n)
Space complexity: O(1)
C++
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// Author: Huahua class Solution { public: int findKthLargest(vector<int>& nums, int k) { nth_element(nums.begin(), nums.begin() + k - 1, nums.end(), std::greater<int>()); return nums[k - 1]; } }; |