Find Subsequence of Length K With the Largest Sum | 2 Approaches | Leetcode 2099 | codestorywithMIK

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Hi Everyone, this is the 5th video of our Playlist "Sorting : Popular Interview Problems".
Now we will be solving an easy Problem on array - Find Subsequence of Length K With the Largest Sum | 2 Approaches | Leetcode 2099 | codestorywithMIK

I will explain it in full detail so that it becomes easy to understand. We will find the reason behind everything so that we understand why we did what we did.
And we will do a complete dry run.

Problem Name : Find Subsequence of Length K With the Largest Sum | 2 Approaches | Leetcode 2099 | codestorywithMIK
Company Tags : will update later
Code Github(C++ & JAVA) : https://github.com/MAZHARMIK/Intervie...
Leetcode Link : https://leetcode.com/problems/find-su...


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Video Summary :
Approach 1 (Sorting with Indices):
The idea is to pair each element with its original index, sort the array by value to find the top k largest elements, then sort those k elements by their original indices to preserve the original order in the result.

Approach 2 (Partial Sort with Threshold):
The intuition is to find the k-th largest value (threshold) using partial sorting, then iterate through the original array and pick elements greater than or equal to the threshold, while maintaining the input order and limiting to k elements.


✨ Timelines ✨
00:00 Introduction
00:14 Motivation
00:40 Problem Explanation
02:23 Thought Process – Approach-1 O(nlogn)
11:53 Approach-2 Intuition Average O(n)
27:05 Corner Case
34:30 Coding Approach-1
37:33 Coding Approach-2


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