25 lines
786 B
Common Lisp
25 lines
786 B
Common Lisp
(require 'asdf)
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(asdf:load-system "cl-strings")
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(require :cl-strings)
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(defun diff (data)
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(let* ((lists (reduce (lambda (acc itm) (cons (cons (parse-integer (car itm)) (car acc)) (cons (parse-integer (cadr itm)) (cdr acc))))
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(mapcar (lambda (line) (cl-strings:split line " "))
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(cl-strings:split data "
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"))
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:initial-value (cons (list) (list)))))
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(reduce (lambda (acc itm)
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(+ acc (* (car itm) (cdr itm))))
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(mapcar (lambda (itm) (cons itm (count itm (cdr lists)))) (car lists))
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:initial-value 0)))
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(format t "~s~%" (diff "3 4
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4 3
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2 5
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1 3
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3 9
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3 3"))
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(format t "~s~%" (diff (string-right-trim '(#\Space #\Newline) (uiop:read-file-string "input"))))
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