application/octet-stream
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591 B
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23 lines
;; The biggest product of 2 3-digit numbers that is a palindrome
;; https://projecteuler.net/problem=4
(defn reverse-num (a)
(def ret 0)
(while (> a 0)
(set! ret (+ (* ret 10) (rem a 10)))
(set! a (div/int a 10)))
ret)
(defn palindrome? (a)
(= a (reverse-num a)))
(defn bench-run ()
(def max-val 0)
(dotimes (a 1000 max-val)
(dotimes (b 1000)
(def p (* a b))
(when (palindrome? p)
(set! max-val (max p max-val))))))
(pfmtln "The biggest product of 2 3-digit numbers that is a palindrome is: {}" (bench-run))
