N = int(input())
B = int(input())
A = list(map(float, input().split()))

X1 = sum(B ** (a - 1) * a for a in A)
X2 = sum(B ** (a + 1) / (a + 1) if a != -1.0 else log(B) for a in A)

print(X1)
print(X2)