Swap Numbers Without Temporary Variable

Your task is to interchange the values of two numbers given as variables 'X' and 'Y' without using a temporary variable or any additional variable.

Explanation:

You need to swap the values of 'X' and 'Y' using specific operations that do not involve extra space allocation for a temporary variable. For instance, if 'X' is 10 and 'Y' is 20, after swapping, 'X' should be 20 and 'Y' should be 10.

Input:

The first line of input contains an integer 'T' representing the number of test cases.
Each of the following 'T' lines contains two space-separated integers 'X' and 'Y'.

Output:

For each test case, return a list or array with two integers 'X' and 'Y' showing their swapped values.

Example:

Input:
T = 2
X, Y = 10, 20
X, Y = 5, -5

Output:
[20, 10]
[-5, 5]

Constraints:

• 1 ≤ T ≤ 2 * 10⁵
• -10⁹ ≤ X, Y ≤ 10⁹

Note: Focus on implementing the function logic to swap the values; you are not required to handle input/output operations.