# Replace every element of the array with BitWise XOR of all other

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); ` ` `  `    ``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)

My Personal Notes arrow_drop_up Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : jit_t, chitranayal, Code_Mech

Article Tags :
Practice Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.