News for hackers. Stuff that matters.

A comment on Black Hat Talk About ‘Time AI’ Causes Uproar, Is Deleted by Conference. Parent comment

Re:Black Hat Talk About ‘Time AI’ Causes Uproar, Is Deleted ... by rurban on Sunday August 11, 2019 @09:50AM (#20668162)
It is. The sum of decimals is much faster than the modulo.
[ Parent | on HN ]
Re:Black Hat Talk About ‘Time AI’ Causes Uproar, Is Deleted ... by thaumasiotes on Sunday August 11, 2019 @06:17PM (#20670900)
Huh? You need modulus either way. n is zero (mod 3) iff its digit sum is zero (mod 3), and it's zero (mod 9) iff its digit sum is zero (mod 9).
[ Parent | on HN ]