How to Solve Decode X O Red Array Problem
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Decode XORed Array
There is a hidden integer array arr that consists of n non-negative integers. It was encoded into another integer array encoded of length n - 1, such that encoded[i] = arr[i] XOR arr[i + 1]. For examp...
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Understanding the Decode X O Red Array Problem
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Problem Statement
There is a hidden integer array arr that consists of n non-negative integers. It was encoded into another integer array encoded of length n - 1, such that encoded[i] = arr[i] XOR arr[i + 1]. For example, if arr = [1,0,2,1], then encoded = [1,2,3]. You are given the encoded array. You are also given an integer first, that is the first element of arr, i.e. arr[0]. Return the original array arr. It can be proved that the answer exists and is unique.
Decode XORed Array
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Examples
encoded = [1,2,3], first = 1[1,0,2,1]If arr = [1,0,2,1], then first = 1 and encoded = [1 XOR 0, 0 XOR 2, 2 XOR 1] = [1,2,3]
encoded = [6,2,7,3], first = 4[4,2,0,7,4]Constraints
2 <= n <= 104encoded.length == n - 10 <= encoded[i] <= 1050 <= first <= 105How Interview Coder Helps with Leetcode Problems
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