Created
November 23, 2010 13:36
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Fib DP ver
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(define (fib x) | |
(let* ((MAX-N 1000) | |
(dp (make-vector MAX-N #f)) | |
(data (make-vector MAX-N))) | |
(let loop((num x)) | |
(if (vector-ref dp x) | |
(vector-ref data x) | |
(let ((tmp (if (>= 2 num) 1 (+ (loop (- num 1)) (loop (- num 2)))))) | |
(vector-set! dp num #t) | |
(vector-set! data num tmp) | |
tmp))))) | |
(display (fib 10)) |
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