Question 1 - 
The problem was a version of - [subarray sum equals k](https://leetcode.com/problems/subarray-sum-equals-k/description/)

Problem - Given an array, return true or false if the subarray with sum equal to target exists.

Follow-up 1 - Given an array, return the length of subarray where the subarray sum equals target. 

Follow-up 2 - Given a matrix, return true or false if there exists a rectangle with sum equal to target. (Just asked the approach for this one)

Question 2 -

Exact problem - [LCA 3](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree-iii/description/?envType=company&envId=facebook&favoriteSlug=facebook-all)




Question 1 -
The problem was a version of - subarray sum equals kProblem - Given an array, return true or false if the subarray with sum equal to target exists.Follow-up 1 - Given an array, return the length of subarray where the subarray sum equals