Kata

Task

You're given two integer numbers (-10**6 <= x,y <= 10**6). The goal is to create a function named int_sum which return their sum.

Restrictions

The restrictions can be summurized as 'bit and logical operations are allowed'.

Here comphrensive description. You're code mustn't contain:

1. `import`, `getattr`, `exec`, `eval`, `sum`  # with next point produce short solutions,
2. `int` class methods names                   # but here is another idea.
3. `if`, `in`, `is`                            # they start with `i` :)
4. `+`, `-`, `*`, `/`, `//`, `%`               # arithmetic operations
5. `==`, `!=`, `<`, `>`, `<=`, `>=`            # comparisions

Note

Advanced version of this kata

Please assess the difficulty of the kata when you finish it :)