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  1. ; https://p...content-available-to-author-only...r.net/problem=205
  2.  
  3. (defn cart [& lists]
  4.   (let [syms (for [_ lists] (gensym))]
  5.     (eval `(for [~@(mapcat #(list %1 `'~%2) syms lists)]
  6.              (list ~@syms)))))
  7.  
  8. (defn project-euler-205 []
  9.  
  10.   (let [rolls (fn [n d]
  11.                 (->> (range 1 (inc d))
  12.                   (repeat n)
  13.                   (apply cart)
  14.                   (map #(apply + %))
  15.                   frequencies))
  16.  
  17.         peter-rolls (rolls 9 4)
  18.         colin-rolls (rolls 6 6)
  19.  
  20.         all-results (* (apply + (vals peter-rolls))
  21.                        (apply + (vals colin-rolls)))
  22.  
  23.         peter-wins (apply + (for [[pk pv] peter-rolls
  24.                                   [ck cv] colin-rolls
  25.                                   :when (> pk ck)]
  26.                               (* pv cv)))]
  27.  
  28.     (/ peter-wins all-results)))
  29.  
  30. (println (project-euler-205))
Success #stdin #stdout 4.17s 389120KB
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https://ideone.com/zIUXS7
language:
Clojure (clojure 1.10.0)
created:
9 years ago
visibility:
secret

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