5. y if x≦y
Tarai(x,y,z) =
Tarai(Tarai(x-1,y,z),Tarai(y-1,z,x),Tarai(z-1,x,y)) otherwise.
(defun tarai (x y z)
(if (<= x y)
y
(tarai (tarai (1- x) y z)
(tarai (1- y) z x)
(tarai (1- z) x y))))
12. Close to You / The Carpenters
Hotel California / Eagles
Blackbird / The Beatles
Cliche Line
Stairway to Heaven / Led Zeppelin
and many baroque music ...
http://www.flickr.com/photos/lizadaly/
13. (defun tarai (x y z)
(if (<= x y)
y
(tarai (tarai (1- x) y z)
(音楽再生)
(tarai (1- y) z x)
(tarai (1- z) x y))))
http://youtu.be/4qsxTV3sg-g