(defun shell-sort (lst cmp)
(let ((numbers '(5 2 8 1 9 4 0 7 3 6)))
(format t "Original list: ~a~%" numbers)
(let ((sorted-numbers (shell-sort numbers #'<)))
(format t "sorted-numbers after shell-sort: ~a~%" sorted-numbers) ; <-- ADD THIS LINE
(format t "Sorted list: ~a~%" sorted-numbers)))
(format t "shell-sort called with lst = ~a~%" lst)
(let ((n (length lst)))
(format t "shell-sort: length(lst) = ~a~%" n)
(if (<= n 1)
(progn (format t "shell-sort: list is short, returning ~a~%" lst) lst)
(let ((steps (sedgewick-sequence n)))
(format t "shell-sort: sedgewick-sequence = ~a~%" steps)
(let ((result (shell-sort-with-steps (copy-list lst) steps cmp)))
(format t "shell-sort: shell-sort-with-steps returned ~a~%" result)
result)))))
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