Fixed slow BFS.
Fixed slow BFS.

VoltaicAge8838/clojure-club,markbastian/clojure-club,rbelohlavek/clojure-club,VoltaicAge8838/clojure-club,markbastian/clojure-club,rbelohlavek/clojure-club,VoltaicAge8838/clojure-club,markbastian/clojure-club