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Grokking the Coding Interview Patterns in C#

Find the K-Sum of an Array

Explore how to find the kth largest subsequence sum in an integer array by understanding subsequences and using logical strategies. This lesson helps you practice coding solutions that handle constraints and duplicate sums, preparing you for complex interview problems.

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Statement

You are given an integer array, nums, and a positive integer k. Your task is to determine and return the kthk^{th} largest possible sum among all subsequences of the array. A subsequence is formed by deleting no or more elements from the array without changing the order of the remaining elements. The sum of a subsequence is the total of its elements.

Remember: For valid subsequences:

  • The empty subsequence is valid, and its sum is considered 00.

  • Duplicate subsequence sums are ...