proposition: Lemma fitqa_topqa r qa : fitqa r qa = (qa <= 8) && (qa == topqa r :> nat).
proof: Proof. by case: r qa => -[]. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype path fingraph) fourcolor(hypermap geometry part quiz quiztree)