import math
n = int(raw_input())
b = int(raw_input())
l = map(float, raw_input().split())
x = 0.0
y = 0.0
for f in l:
    x += (b ** (f-1)) * f
    if f == -1.0:
        y += math.log(abs(b))
    else:
        y += (b ** (f+1)) / (f+1)
print x
print y