Add tournament rounds task

src/battle_asserts/issues/tournament_rounds.clj

@@ -0,0 +1,30 @@
+(ns battle-asserts.issues.tournament-rounds
+  (:require [clojure.test.check.generators :as gen]))
+
+(def level :elementary)
+
+(def tags ["math" "training"])
+
+(def description
+  {:en "Codebattle programmers are rewriting tournaments in React. They need to calculate the `number of rounds' based on the `number of participants' in tournament. Create such function to help them."
+   :ru "Программисты Codebattle переписывают турниры на React. Им нужно рассчитать `количество раундов`, исходя из `количества участников` в турнире. Помогите им создать такую функцию."})
+
+(def signature
+  {:input [{:argument-name "participants" :type {:name "integer"}}]
+   :output {:type {:name "integer"}}})
+
+(defn arguments-generator []
+  (let [samples (map #(int (Math/pow 2 %)) (range 1 15))]
+    (gen/tuple (gen/elements samples))))
+
+(def test-data
+  [{:expected 1 :arguments [2]}
+   {:expected 4 :arguments [16]}
+   {:expected 5 :arguments [32]}
+   {:expected 3 :arguments [8]}])
+
+(defn- log2 [n]
+  (/ (Math/log n) (Math/log 2)))
+
+(defn solution [participants]
+  (int (log2 participants)))