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Grokking the Coding Interview Patterns in C++

Solution: K Maximum Sum Combinations From Two Arrays

Understand how to efficiently determine the top k maximum sum combinations from two integer arrays by using max heap data structures and sorting. Learn to avoid brute force, handle indexing with visited sets, and optimize time and space complexity through a clear step-by-step solution.

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Statement

You are given two integer arrays, arr1 and arr2, each of size nn. You are also given an integer k. Your task is to return the k largest sum combinations that can be formed by adding one element from arr1 and one element from arr2, for all possible pairs (arr1[i] + arr2[j]), where 0≤i,j<n0 ≤ i, j < n.

Note: The output should be sorted in non-increasing order.

Constraints:

  • 1≤n≤10001 ≤ n ≤ 1000 ...