from math import log
N = int(input())
B = int(input())
A = list(map(float, input().split()))
a1 = 0
a2 = 0
for a in A:
    a1 += a * pow(B, a - 1)
    if a == -1:
        a2 += log(B)
    else:
        a2 += pow(B, a + 1) / (a + 1)
print(a1)
print(a2)