# code: http://golf.shinh.org/reveal.rb?Sum+the+deltas/tails_1644218201&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

- #(subtract):int 
    / #(foldr1):int 
        ints #(_):[int] 
        \B A 
        A #(@):int 
    / #(foldr1):int 
        ints #(_):[int] 
        #\D C 
        #(implicit arg = D):int