Скачать или смотреть 2433. Find The Original Array of Prefix Xor - Leetcode c++

🔍 Find the Original Array from Prefix XOR | Easy Explanation

In this video, we solve the problem “Find the Original Array of Prefix XOR” step by step with a clear and intuitive explanation.

📌 Problem Overview
You are given an array pref where each element represents the prefix XOR of an unknown array arr.
Your task is to reconstruct the original array.

📌 Key Insight

Prefix XOR property helps us reverse the operation

XOR has special properties:

a ⊕ a = 0

a ⊕ 0 = a

Using these, we can efficiently rebuild the original array in O(n) time.

📌 Approach Explained

The first element of the original array is the same as the first prefix XOR

Every next element can be found using:

arr[i] = pref[i] ⊕ pref[i-1]


📌 Why This Works

XOR cancels out previous values

Simple math + logical observation = elegant solution
#PrefixXOR
#XOR
#leetcode
#dsa
#Arrays
#BitManipulation
#CodingInterview
#CompetitiveProgramming
#Cplusplus
#ProblemSolving