require 'prime' n=gets.to_i resultL=nil resultH=n-1 div=[] Prime.prime_division(n).each{|e| div+=[e[0]]*e[1] } if div.size==1 printf("%d %d",resultH,resultH) exit elsif div.size==2 printf("%d %d",div[0]+div[1]-2,resultH) exit end # ? printf("%d %d",div.inject(:+)-div.size,resultH)