Leetcode 3346. Maximum Frequency of an Element After Performing Operations I

Given nums, k, and numOperations, you may pick up to numOperations distinct indices and add an integer in [-k, k] to each; find the maximum number of elements that can be made equal after these bounded modifications. The challenge is to group elements that can be shifted to a common value under per-element ±k limits and a hard cap on how many elements you can change (n up to 1e5).