Leetcode Problem 1679. Max Number of K-Sum Pairs

1679. Max Number of K-Sum Pairs

Leetcode Solutions

Using Hashmap - Single Pass

  1. Initialize an empty hashmap to store elements and their counts.
  2. Initialize a variable count to 0 to keep track of the number of operations performed.
  3. Iterate over each element in the array nums. a. For the current element, calculate its complement with respect to k (i.e., complement = k - current). b. Check if the complement exists in the hashmap. i. If it does, and the count is greater than 0, increment count, and decrement the count of the complement in the hashmap. ii. If the complement does not exist or has a count of 0, add/increment the current element in the hashmap.
  4. Return the value of count.
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Two Pointer Approach Using Sort

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