Leetcode Problem 532. K-diff Pairs in an Array

532. K-diff Pairs in an Array

Leetcode Solutions

Initialize an empty hashmap to store the frequency of each number in nums.
Iterate over nums, populating the hashmap with the count of each number.
Initialize a variable result to 0 to count the unique k-diff pairs.
Iterate over the keys of the hashmap. a. If k is greater than 0, check if key + k exists in the hashmap. If it does, increment result. b. If k is 0, check if the frequency of the key is greater than 1. If it is, increment result.
Return the value of result.

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