program main
  implicit none
  integer::AA,BB
  integer::a,b,i,j,upper,lower
  read *,AA,BB

  do i=1,200
     upper = INT((i*(AA-2))/100.0)
     lower = INT((i*(AA+2))/100.0)
     do j = upper, lower
        a = INT((  (j*1.0)/i)*100+0.501)
        b = INT((1.0*(i-j)/i)*100+0.501)
        if( a.eq.AA .and. b.eq.BB) then
           print '(i0)',i
           return
        end if
     end do
  end do
end program main