Ruairí O'Brien

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Day 16 - Kth Largest Element in an Array

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.

My Tests

``````import pytest
from .Day16_KthLargestElementInAnArray import Solution

s = Solution()

@pytest.mark.parametrize(
"nums,k,expected",
[
([3,2,1,5,6,4], 2, 5),
([3,2,3,1,2,4,5,5,6], 4, 4),

],
)
def test_get_maximum_generated(nums, k, expected):
assert s.findKthLargest(nums, k) == expected
``````

My Solution

``````from typing import List

class Solution:
def findKthLargest(self, nums: List[int], k: int) -> int:
return sorted(nums)[len(nums) - k]
``````

My Commentary

Sorting the array and finding the kth from the end is clearly not the best solution but it's the simplest and it's Saturday.