module Euler1

imports
  Prelude

where

main :: () -> I32
main () = do
  t = new (0 :: W32)
  times 1000
    (\i -> when (is_factor i 3 || is_factor i 5) (t += i))
  assert (@t == 233168)
  putW @t
  0

is_factor a b => (a % b) == 0