Talk:ABC problem: Difference between revisions
Content added Content deleted
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<code> |
<code> |
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(defun word-possible-p (word alphabet) |
(defun word-possible-p (word alphabet) |
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(labels ((% |
(labels ((%usablep (b) |
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(find (char-upcase (char word 0)) b))) |
(find (char-upcase (char word 0)) b))) |
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(or (zerop (length word)) |
(or (zerop (length word)) |
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(iter |
(iter |
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(for candidate :in (remove-if-not #'% |
(for candidate :in (remove-if-not #'%usablep alphabet)) |
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(when (word-possible-p |
(when (word-possible-p |
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(subseq word 1) (remove candidate alphabet :count 1)) |
(subseq word 1) (remove candidate alphabet :count 1)) |