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Minimize the Maximum Difference of Pairs

Medium

You receive a 0-indexed integer array nums and an integer p . Find p pairs of indices of nums such that the maximum difference amongst all the pairs is minimized . Also, ensure no index appears more than once amongst the p pairs.

Note that for a pair of elements at the index i and j , the difference of this pair is |nums[i] - nums[j]| , where |x| represents the absolute value of x .

Produce the minimum maximum difference among all p pairs. We define the maximum of an empty set to be zero.

Example 1

Input: nums = [10,1,2,7,1,3], p = 2

Output: 1

Explanation: The first pair is formed from the indices 1 and 4, and the second pair is formed from the indices 2 and 5.

The maximum difference is max(|nums[1] - nums[4]|, |nums[2] - nums[5]|) = max(0, 1) = 1. Therefore, we return 1.

Example 2

Input: nums = [4,2,1,2], p = 1

Output: 0

Explanation: Let the indices 1 and 3 form a pair. The difference of that pair is |2 - 2| = 0, which is the minimum we can attain.

Constraints

  • 1 <= nums.length <= 10^5
  • 0 <= nums[i] <= 10^9
  • 0 <= p <= (nums.length)/2

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