Finding Pairs With a Certain Sum | Simple Explanation | Leetcode 1865 | codestorywithMIK
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Hi Everyone, this is the 20th video of our Playlist "Design Data Structure : Popular Interview Problems".
Now we will be solving an Medium Problem on Design Data Structure - Finding Pairs With a Certain Sum | Simple Explanation | Leetcode 1865 | 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 : Finding Pairs With a Certain Sum | Simple Explanation | Leetcode 1865 | codestorywithMIK
Company Tags : will update later
Code Github(C++ & JAVA) : https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Design/Finding Pairs With a Certain Sum.cpp
Leetcode Link : https://leetcode.com/problems/finding-pairs-with-a-certain-sum
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Video Summary :
This approach uses a frequency map to track elements in nums2, enabling quick lookups during count operations.
For each element in nums1, it checks how many complements (tot - num1) exist in nums2 via the map.
Updates to nums2 adjust the map incrementally, maintaining efficiency for both add and count operations.
✨ Timelines✨
00:00 - Introduction
00:34 - Motivation
01:25 - Problem Explanation
03:49 - Thought Process
09:33 - Important Catch
12:35 - Dry Run
16:35 - Coding it up
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