a Christmas party city S n child all child come mitten the mitten different color child leave right mitten color Lets color mitten number integer 1 m child number 1 n then ith child mitten color ciThe Party Santa Claus Father Frost russian granddaughter Snow Girl child dance richly decorate Christmas tree in fact bright diverse child want wear mitten distinct color the child decide swap mitten got leave right mitten end mitten distinct color all mitten size fit childrenThe child start exchange mitten haphazardly could not reach situation child pair mitten distinct color Vasily Petrov dad child note general case children idea turn impossible besides mathematician come scheme distribute mitten number child distinctcolore mitten maximum you task repeat discovery Note leave right mitten different child end leave right mitten