Find K Closest Elements
Updated Feb 24, 2026
Problem
Return k closest elements to x in ascending order.
Constraints
1 <= k <= arr.length <= 10^4
Examples
Example 1
Input:
{"arr": [1, 2, 3, 4, 5], "k": 4, "x": 3}
Output:
[1, 2, 3, 4]
Function Signature
def findClosestElements(self, arr: list[int], k: int, x: int) -> list[int]
How to Submit
Implement a Solution class with a findClosestElements method.
Your method will be called with the input parameters and should return the answer.