なんかこんな感じで解きたかったのだがzip(list)が期待する動きと違った >>(use gauche.sequence) =>#<undef> >>(use util.combinations) =>#<undef> >>(filter (lambda (x) (eq? 9 (length (map car (group-sequence (sort (fold append () x))))))) (combinations (filte</undef></undef>…