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  1. ; your code goes here
  2. (defun perm (l)
  3.   (when (null l) (return-from perm nil))
  4.   (when (= (length l) 1) (return-from perm (list l)))
  5.   (mapcan (lambda (e) 
  6. 	    (mapcar (lambda (p)
  7. 		      (append (list e) p)) 
  8. 		    (perm (remove e l))))
  9. 	  l))
  10.  
  11. (dolist (p (perm '(1 2 3 4 5)))
  12. 	(format t "~A~%" p))
Success #stdin #stdout 0.03s 10832KB
comments (?)
stdin 
Standard input is empty
stdout 
(1 2 3 4 5)
(1 2 3 5 4)
(1 2 4 3 5)
(1 2 4 5 3)
(1 2 5 3 4)
(1 2 5 4 3)
(1 3 2 4 5)
(1 3 2 5 4)
(1 3 4 2 5)
(1 3 4 5 2)
(1 3 5 2 4)
(1 3 5 4 2)
(1 4 2 3 5)
(1 4 2 5 3)
(1 4 3 2 5)
(1 4 3 5 2)
(1 4 5 2 3)
(1 4 5 3 2)
(1 5 2 3 4)
(1 5 2 4 3)
(1 5 3 2 4)
(1 5 3 4 2)
(1 5 4 2 3)
(1 5 4 3 2)
(2 1 3 4 5)
(2 1 3 5 4)
(2 1 4 3 5)
(2 1 4 5 3)
(2 1 5 3 4)
(2 1 5 4 3)
(2 3 1 4 5)
(2 3 1 5 4)
(2 3 4 1 5)
(2 3 4 5 1)
(2 3 5 1 4)
(2 3 5 4 1)
(2 4 1 3 5)
(2 4 1 5 3)
(2 4 3 1 5)
(2 4 3 5 1)
(2 4 5 1 3)
(2 4 5 3 1)
(2 5 1 3 4)
(2 5 1 4 3)
(2 5 3 1 4)
(2 5 3 4 1)
(2 5 4 1 3)
(2 5 4 3 1)
(3 1 2 4 5)
(3 1 2 5 4)
(3 1 4 2 5)
(3 1 4 5 2)
(3 1 5 2 4)
(3 1 5 4 2)
(3 2 1 4 5)
(3 2 1 5 4)
(3 2 4 1 5)
(3 2 4 5 1)
(3 2 5 1 4)
(3 2 5 4 1)
(3 4 1 2 5)
(3 4 1 5 2)
(3 4 2 1 5)
(3 4 2 5 1)
(3 4 5 1 2)
(3 4 5 2 1)
(3 5 1 2 4)
(3 5 1 4 2)
(3 5 2 1 4)
(3 5 2 4 1)
(3 5 4 1 2)
(3 5 4 2 1)
(4 1 2 3 5)
(4 1 2 5 3)
(4 1 3 2 5)
(4 1 3 5 2)
(4 1 5 2 3)
(4 1 5 3 2)
(4 2 1 3 5)
(4 2 1 5 3)
(4 2 3 1 5)
(4 2 3 5 1)
(4 2 5 1 3)
(4 2 5 3 1)
(4 3 1 2 5)
(4 3 1 5 2)
(4 3 2 1 5)
(4 3 2 5 1)
(4 3 5 1 2)
(4 3 5 2 1)
(4 5 1 2 3)
(4 5 1 3 2)
(4 5 2 1 3)
(4 5 2 3 1)
(4 5 3 1 2)
(4 5 3 2 1)
(5 1 2 3 4)
(5 1 2 4 3)
(5 1 3 2 4)
(5 1 3 4 2)
(5 1 4 2 3)
(5 1 4 3 2)
(5 2 1 3 4)
(5 2 1 4 3)
(5 2 3 1 4)
(5 2 3 4 1)
(5 2 4 1 3)
(5 2 4 3 1)
(5 3 1 2 4)
(5 3 1 4 2)
(5 3 2 1 4)
(5 3 2 4 1)
(5 3 4 1 2)
(5 3 4 2 1)
(5 4 1 2 3)
(5 4 1 3 2)
(5 4 2 1 3)
(5 4 2 3 1)
(5 4 3 1 2)
(5 4 3 2 1)
https://ideone.com/YgQhVW
language:
Common Lisp (clisp 2.49.92)
created:
11 years ago
visibility:
public

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