Package g2401_2500.s2433_find_the_original_array_of_prefix_xor

Class Solution

java.lang.Object
g2401_2500.s2433_find_the_original_array_of_prefix_xor.Solution
public class Solution extends java.lang.Object
2433 - Find The Original Array of Prefix Xor.

Medium

You are given an integer array pref of size n. Find and return the array arr of size n that satisfies:

  • pref[i] = arr[0] ^ arr[1] ^ ... ^ arr[i].

Note that ^ denotes the bitwise-xor operation.

It can be proven that the answer is unique.

Example 1:

Input: pref = [5,2,0,3,1]

Output: [5,7,2,3,2]

Explanation: From the array [5,7,2,3,2] we have the following:

  • pref[0] = 5.

  • pref[1] = 5 ^ 7 = 2.

  • pref[2] = 5 ^ 7 ^ 2 = 0.

  • pref[3] = 5 ^ 7 ^ 2 ^ 3 = 3.

  • pref[4] = 5 ^ 7 ^ 2 ^ 3 ^ 2 = 1.

Example 2:

Input: pref = [13]

Output: [13]

Explanation: We have pref[0] = arr[0] = 13.

Constraints:

  • 1 <= pref.length <= 105
  • 0 <= pref[i] <= 106

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int[]
    findArray(int[] pref)
     

    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

    • findArray

      public int[] findArray(int[] pref)