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Leetcode Problem 2386. Find the K-Sum of an Array

2386. Find the K-Sum of an Array

Leetcode Solutions

Priority Queue Approach for K-Sum Problem

  1. Calculate the initial maximum sum by summing all positive numbers in the array.
  2. Convert all negative numbers to their absolute values and sort the array.
  3. Initialize a priority queue and insert a pair containing the initial maximum sum minus the smallest number and the index 0.
  4. Repeat the following steps until k-1 smallest sums are found: a. Extract the smallest sum from the priority queue. b. Insert two new sums into the priority queue: one including the next number and one excluding it.
  5. The k-th largest sum is the initial maximum sum minus the k-1 smallest sum found.
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Dynamic Programming Approach for K-Sum Problem

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