393
Rule
(lemmy.blahaj.zone)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
You can just bitwise AND those with ...000000001 (for however many bits are in your number). If the result is 0, then the number is even, and if it's 1, then the number is odd. This works for negative numbers because it discards the negative signing bit.