# require 'pry'

gets
$d = gets.split.map(&:to_i)
x,y = gets.split.map(&:to_i).map(&:abs)
$dm = $d.max

def solve x
  if x == 0
    0
  elsif $d.include? x
    1
  elsif x <= 2*$dm
    x == $dm ? 1 : 2
  else
    y = [0, x - (2*$dm)].max
    jump = (y + $dm - 1) / $dm
    jump + solve(x - jump*$dm)
  end
end

puts solve [x, y].max