Leetcode Problem 532. K-diff Pairs in an Array

532. K-diff Pairs in an Array

Leetcode Solutions

Approach: Hashmap

  1. Initialize an empty hashmap to store the frequency of each number in nums.
  2. Iterate over nums, populating the hashmap with the count of each number.
  3. Initialize a variable result to 0 to count the unique k-diff pairs.
  4. 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.
  5. Return the value of result.
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Approach: Two Pointers

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