Swap Without Temp Variable | Dataford Interview Questions

In an Aditi Consulting coding exercise, implement a small utility that swaps two integer values without declaring or using a temporary variable. Return the swapped values in their new order.

Formal Specification

Write a function swap_numbers(a, b) that accepts two integers and returns a two-element tuple (b, a). The function must not use an explicitly declared temporary variable such as temp. Do not modify external state.

Python's multiple assignment syntax is allowed. The goal is to demonstrate a clear, idiomatic solution rather than manually simulating storage with a third named variable.

Constraints

a and b are integers.
-10^9 <= a, b <= 10^9.
No explicit temporary variable may be declared.
The solution must use O(1) auxiliary space.

Function Signature

def swap_numbers(a, b):

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