Recursion Pattern 2: Check if Subsequence Exists with sum K

Recursion Pattern 2: Check if a Subsequence Exists

In this video, we dive into Recursion Pattern 2, where we explore how to check if a subsequence exists in a given array whose sum equals a target value K.
Using recursion, we explain the decision-making process at every step — pick or not pick, and show how to terminate early when a valid subsequence is found.
We also include the recursive function flow, tree diagram, and step-by-step debugging for clarity.

Practise Here: https://www.geeksforgeeks.org/problems/check-if-there-exists-a-subsequence-with-sum-k/1

✨ By the end, you'll understand:

How to structure recursion to return a boolean
How to prune unnecessary paths
When to use early return for efficiency

Видео Recursion Pattern 2: Check if Subsequence Exists with sum K канала Pen And Paper