Скачать или смотреть Count Subarrays with given XOR | GFG 160-Day Challenge Day 50 | GFG POTD

This video focuses on solving the Count Subarrays with Given XOR problem, a key topic in array manipulation and hashing techniques.

👉 Problem Statement:

Given an array of integers and a target value K, find the number of subarrays whose XOR equals K.


📌 Concepts Covered:

1. Bitwise XOR Basics:

Understand the XOR operation and its properties, like a ^ a = 0 and a ^ 0 = a.



2. Prefix XOR Approach:

Compute prefix XOR to optimize the solution.

Use a hash map to store previously seen XORs to find subarrays efficiently.



3. Time Complexity Optimization:

Reduce the brute-force O(n²) approach to O(n) using hashing.





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🔑 Key Insights:

The XOR of a subarray can be derived using the formula:
XOR[i to j] = XOR[0 to j] ^ XOR[0 to i-1]

The target XOR condition is achieved when:
XOR[0 to j] ^ K = XOR[0 to i-1].



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📚 Example:

Input:
arr = [4, 2, 2, 6, 4]
K = 6

Output:
4

Explanation:
The subarrays with XOR equal to 6 are:

[4, 2]

[2, 2, 6]

[6]

[4, 2, 2, 6]




🔗 Useful Links :-
Problem Link 1 :- https://www.geeksforgeeks.org/batch/g...

Problem Link 2 :- https://www.geeksforgeeks.org/problem...

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⚡ Tip:

Always leverage the power of hash maps to solve problems involving prefix sums or XOR efficiently.

#Subarrays #XOR #Hashing
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