n, m = gets.split.map &:to_i
r = Rational(n, m)
i = 0
while r != 1
  if r.denominator == 1
    i += (r - 1).to_i
    break
  elsif r > 1
    s = r.to_i
    r = r - s
    i += s
  else
    r = 1 / r
    i += 1
  end
end
puts i