Maximum Unique Subarray Sum After Deletion | Constant Space | Leetcode 3487 | codestorywithMIK
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Hi Everyone, this is the 102nd video of our Playlist "Leetcode Easy : Popular Interview Problems".
Now we will be solving an easy Set based Problem - Maximum Unique Subarray Sum After Deletion | Constant Space | Leetcode 3487 | codestorywithMIK
I will explain it in full detail so that it becomes easy to understand. Each line will be explained and you will know the WHY behind everything.
Problem Name : Maximum Unique Subarray Sum After Deletion | Constant Space | Leetcode 3487 | codestorywithMIK
Company Tags : will update later
Code Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/HashSet/Leetcode Easy/Maximum Unique Subarray Sum After Deletion.cpp
Leetcode Link - https://leetcode.com/problems/maximum-unique-subarray-sum-after-deletion
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Video Summary :
Approach 1 (Using set):
Uses a set to track unique positive numbers.
Achieves O(n) time and O(n) space.
Approach 2 (Using constant space):
Uses an array as a hash table to track uniqueness.
Achieves O(n) time and O(1) space.
The key intuition is that we need to track the uniqueness of positive numbers to avoid double counting in the sum. Approach 1 uses a set, which gives O(1) lookup but needs O(n) space. Approach 2 simulates a set using an array, sacrificing lookup time but gaining O(1) space.
✨ Timelines✨
00:00 - Introduction
0:22 - Motivation
0:50 - Problem Explanation
1:40 - Thought Process
6:25 - Using constant space
7:23 - Coding it up O(n) Space
8:41 - Coding it up O(1) Space
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