Find Missing and Repeated Values | Mathematical Proof | Leetcode 2965 | codestorywithMIK
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Hi Everyone, this is the 72nd video of our Playlist "Leetcode Easy".
Now we will be solving an easy practice problem on Maths - Find Missing and Repeated Values | Mathematical Proof | Leetcode 2965 | codestorywithMIK
We will solve it with 2 Approaches and will also see the mathematical derivation of the equations to derive our answer.
Problem Name : Find Missing and Repeated Values | Mathematical Proof | Leetcode 2965 | codestorywithMIK
Company Tags : will update later
My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Mathematical/Leetcode Easy/Find Missing and Repeated Values.cpp
Leetcode Link : https://leetcode.com/problems/find-missing-and-repeated-values
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Video Summary :
Approach-1 (Using HashMap):
This approach uses a HashMap to count the occurrences of each number in the grid. By iterating through numbers from 1 to N, it identifies the missing and repeated values based on their frequencies.
Approach-2 (Using Mathematics):
This approach calculates the expected sum and sum of squares for numbers from 1 to N. By comparing them with the actual sums from the grid, it derives equations to find the missing and repeated numbers.
✨ Timelines ✨
00:00 - Introduction
0:16 - Motivation
0:45 - Problem Explanation
2:37 - Approach 1 (Using Map)
5:27 - Approach 2 (Using Maths)
18:59 - Coding Approach-1
21:15 - Coding Approach-2
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