n = read_line.to_i
b = read_line.to_f
a = read_line.split.map(&.to_f)
puts a.sum { |x| x == 0 ? 0.0 : b**(x - 1) * x }
puts a.sum { |x| x == -1 ? Math.log(b) : b**(x + 1) / (x + 1) }