#3397 - Maximum Number of Distinct Elements After Operations

Medium • View on LeetCode • View on GitHub

Problem Description

You are given an integer array nums and an integer k.

You are allowed to perform the following operation on each element of the array at most once:

Add an integer in the range [-k, k] to the element.

Return the maximum possible number of distinct elements in nums after performing the operations.

Solution

/**
 * @param {number[]} nums
 * @param {number} k
 * @return {number}
 */
var maxDistinctElements = function(nums, k) {
  nums.sort((a, b) => a - b);
  let last = nums[0] - k;
  let count = 1;

  for (let i = 1; i < nums.length; i++) {
    if (last + 1 > nums[i] + k) continue;
    last = Math.max(last + 1, nums[i] - k);
    count++;
  }

  return count;
};