Package g1701_1800.s1720_decode_xored_array

Class Solution

java.lang.Object

g1701_1800.s1720_decode_xored_array.Solution

public class Solution
extends Object

1720 - Decode XORed Array\. Easy 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. **Example 1:** **Input:** encoded = [1,2,3], first = 1 **Output:** [1,0,2,1] **Explanation:** If arr = [1,0,2,1], then first = 1 and encoded = [1 XOR 0, 0 XOR 2, 2 XOR 1] = [1,2,3] **Example 2:** **Input:** encoded = [6,2,7,3], first = 4 **Output:** [4,2,0,7,4] **Constraints:** * 2 <= n <= 104 * `encoded.length == n - 1` * 0 <= encoded[i] <= 105 * 0 <= first <= 105

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int[]	decode(int[] encoded, int first)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

decode

public int[] decode(int[] encoded,
 int first)