15 lines
437 B
Scheme
15 lines
437 B
Scheme
(define (change amount kinds-of-coins)
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(cond ((or (< amount 0) (= kinds-of-coins 0)) 0)
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((= amount 0) 1)
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(else (+ (change amount (- kinds-of-coins 1))
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(change (- amount (amount-wo-largest-coin kinds-of-coins)) kinds-of-coins)))))
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(define (amount-wo-largest-coin coins-left)
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(cond ((= coins-left 5) 50)
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((= coins-left 4) 25)
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((= coins-left 3) 10)
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((= coins-left 2) 5)
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((= coins-left 1) 1)))
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(print (change 100 5))
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