gistfile1.clj

(ns zow.core)

(def maps [{:a 1 :b 2}
           {:a 11 :b 22 :c 5}
           {:c 6 :a 7}])

(defn my-merge-maps
  [maps]
  (apply merge-with
         (fn [curr-val new-val]
           (if (set? curr-val)
             (conj curr-val new-val)
             #{curr-val new-val}))
         maps))

(defn -main
  []
  (println (my-merge-maps maps)))