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kevgathuku/collatz-pre.clj

Last active January 2, 2019 13:26
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collatz-pre.clj
(defn compute-collatz [num steps]
(cond
(= num 1) steps
(even? num) (compute-collatz (/ num 2) (inc steps))
(odd? num) (compute-collatz (+ 1 (* num 3)) (inc steps))))
(defn collatz [num]
{:pre [(pos? num)]}
(compute-collatz num 0))
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