class Main
  def self.run
    a, b, c = read_input
    puts ascending?(a, b, c)
  end

  private

  def self.read_input
    gets.split(" ").map {|x| x.to_i}
  end

  def self.ascending?(a, b, c)
    (a < b && b < c) ? "Yes" : "No"
  end
end

Main.run