MODE = "stdio"

tmp = Array.new




if(defined? MODE)
  tmp = STDIN.read.split("\n")
else
  iotmp = "\
  10
  10
  -5.0 2.2 4.6 5.0 -1.0 2.0 0.5 0.3 -3.9 1.5
  ".split("\n")
  iotmp.each{|s|
    tmp << s.strip
  }
end


N = tmp[0].to_i

B = tmp[1].to_i

a = tmp[2].split(" ").map(&:to_f)


cnt=0.0
bibun=0
sekibun=0
a.each do |n|
  bibun += n*B**(n-1)
  if n==-1.0
    sekibun += Math::log(B)
  else
    sekibun += 1/(n+1)*B**(n+1)
  end
end
printf("%.20f\n", bibun)
printf("%.20f\n", sekibun)