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Ingy döt Net 2013-04-10 12:38:42 -07:00
parent 3af7344581
commit 86c034bb8b
1364 changed files with 21352 additions and 0 deletions
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23
Task/Balanced-brackets/Scheme/balanced-brackets.ss Normal file
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(define (balanced-brackets string)
(define (b chars sum)
(cond ((and (null? chars) (= 0 sum))
#t)
((null? chars)
#f)
((char=? #\[ (car chars))
(b (cdr chars) (+ sum 1)))
((= sum 0)
#f)
(else
(b (cdr chars) (- sum 1)))))
(b (string->list string) 0))
(balanced-brackets "")
(balanced-brackets "[]")
(balanced-brackets "[][]")
(balanced-brackets "[[][]]")
(balanced-brackets "][")
(balanced-brackets "][][")
(balanced-brackets "[]][[]")