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Replace every element of the array with BitWise XOR of all other
• Difficulty Level : Basic
• Last Updated : 14 Dec, 2018

Given an array of integers. The task is to replace every element by the bitwise xor of all other elements of the array.

Examples:

```Input: arr[] = { 2, 3, 3, 5, 5 }
Output: 0 1 1 7 7
Bitwise Xor of 3, 3, 5, 5 = 0
Bitwise Xor of 2, 3, 5, 5 = 1
Bitwise Xor of 2, 3, 5, 5 = 1
Bitwise Xor of 2, 3, 3, 5 = 7
Bitwise Xor of 2, 3, 3, 5 = 7

Input : arr[] = { 1, 2, 3 }
Output : 1 2 3
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach :

1. First, take the bitwise xor of all the element of the array and store it in variable let’s X.
2. Now replace each element by the xor of X and that element, since xoring the same element will cancel out leaving the xor of all the other elements.
3. Print the modified array.

Below is the implementation of above approach:

## C++

 `// C++ program to Replace every element``// by the bitwise xor of all other elements``#include ``using` `namespace` `std;`` ` `// Function to replace the elements``void` `ReplaceElements(``int` `arr[], ``int` `n)``{``    ``int` `X = 0;`` ` `    ``// Calculate the xor of all the elements``    ``for` `(``int` `i = 0; i < n; ++i) {``        ``X ^= arr[i];``    ``}`` ` `    ``// Replace every element by the``    ``// xor of all other elements``    ``for` `(``int` `i = 0; i < n; ++i) {``        ``arr[i] = X ^ arr[i];``    ``}``}`` ` `// Driver code``int` `main()``{``    ``int` `arr[] = { 2, 3, 3, 5, 5 };``    ``int` `n = ``sizeof``(arr) / ``sizeof``(arr[0]);`` ` `    ``ReplaceElements(arr, n);`` ` `    ``// Print the modified array.``    ``for` `(``int` `i = 0; i < n; ++i) {``        ``cout << arr[i] << ``" "``;``    ``}``    ``return` `0;``}`

## Java

 `// Java  program to Replace every element ``// by the bitwise xor of all other elements `` ` `import` `java.io.*;`` ` `class` `GFG {``     ` `// Function to replace the elements ``static` `void` `ReplaceElements(``int` `arr[], ``int` `n) ``{ ``    ``int` `X = ``0``; `` ` `    ``// Calculate the xor of all the elements ``    ``for` `(``int` `i = ``0``; i < n; ++i) { ``        ``X ^= arr[i]; ``    ``} `` ` `    ``// Replace every element by the ``    ``// xor of all other elements ``    ``for` `(``int` `i = ``0``; i < n; ++i) { ``        ``arr[i] = X ^ arr[i]; ``    ``} ``} `` ` `// Driver code `` ``public` `static` `void` `main (String[] args) {`` ` `    ``int` `arr[] = { ``2``, ``3``, ``3``, ``5``, ``5` `}; ``    ``int` `n = arr.length; `` ` `    ``ReplaceElements(arr, n); `` ` `    ``// Print the modified array. ``    ``for` `(``int` `i = ``0``; i < n; ++i) { ``        ``System.out.print(arr[i] +``" "``);``         ` `        ``}``    ``}``}`

## Python 3

 `# Python 3 program to Replace every element``# by the bitwise xor of all other elements`` ` `# Function to replace the elements``def` `ReplaceElements(arr, n):`` ` `    ``X ``=` `0`` ` `    ``# Calculate the xor of all the elements``    ``for` `i ``in` `range``(n):``        ``X ^``=` `arr[i]`` ` `    ``# Replace every element by the``    ``# xor of all other elements``    ``for` `i ``in` `range``(n):``        ``arr[i] ``=` `X ^ arr[i]`` ` `# Driver code``if` `__name__ ``=``=` `"__main__"``:``    ``arr ``=` `[ ``2``, ``3``, ``3``, ``5``, ``5` `]``    ``n ``=` `len``(arr)`` ` `    ``ReplaceElements(arr, n)`` ` `    ``# Print the modified array.``    ``for` `i ``in` `range``(n):``        ``print``(arr[i], end ``=` `" "``)`` ` `# This code is contributed``# by ChitraNayal`

## C#

 `// C#  program to Replace every element ``// by the bitwise xor of all other elements ``using` `System;`` ` `public` `class` `GFG{``    ``// Function to replace the elements ``static` `void` `ReplaceElements(``int` `[]arr, ``int` `n) ``{ ``    ``int` `X = 0; `` ` `    ``// Calculate the xor of all the elements ``    ``for` `(``int` `i = 0; i < n; ++i) { ``        ``X ^= arr[i]; ``    ``} `` ` `    ``// Replace every element by the ``    ``// xor of all other elements ``    ``for` `(``int` `i = 0; i < n; ++i) { ``        ``arr[i] = X ^ arr[i]; ``    ``} ``} `` ` `// Driver code ``     ` `    ``static` `public` `void` `Main (){``         ` `    ``int` `[]arr = { 2, 3, 3, 5, 5 }; ``    ``int` `n = arr.Length; `` ` `    ``ReplaceElements(arr, n); `` ` `    ``// Print the modified array. ``    ``for` `(``int` `i = 0; i < n; ++i) { ``        ``Console.Write(arr[i] +``" "``); ``         ` `        ``} ``    ``}``//This code is contributed by ajit    ``}`

## PHP

 ``
Output:
```0 1 1 7 7
```

Time Complexity: O(N)

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