A, B = gets.split.map(&:to_i)
ans = [*(0..1000)].product([*(0..1000)]).select {|a, b|
  (a + b) * (2 * A - 1) <= 200 * a and 200 * a < (a + b) * (2 * A + 1) and
  (a + b) * (2 * B - 1) <= 200 * b and 200 * b < (a + b) * (2 * B + 1)}.map {|(a, b)| a + b}.min
puts ans