Скачать или смотреть Sum of pairwise Hamming Distance | InterviewBit Math | Solution Explained in Detail

Sum of pairwise Hamming Distance is an interesting interview question. I explain the bit manipulation approach in detail, along with visuals to help understand things better. First we start with the bruteforce solution, iterating over all the pairs of integers. For each pair, we calculate the hamming distance. Since the Time Complexity exceeds the constraints, we look for an optimization. We realize that its a simple change in perspective, that allows us to convert the solution into an O(N) solution down from O(N^2). The code is done in C++, but is also available in C++ and Python3 in the writeup.

Writeup (Summary + Code):
https://chaudhary1337.com/sum-of-pair...

Problem link:
https://www.interviewbit.com/problems...
https://leetcode.com/problems/total-h...

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Timestamps:
0:00 Introduction
0:19 Problem Discussion
2:16 Brute-force Solution
3:30 Optimization Explained
8:31 Code

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