#differential
import math
N=int(input())
B=int(input())
a=[float(i) for i in input().split()]
pa=[0.0]*N
d=0.0
for i in range(N):
    dn=1.0
    pa[i]=a[i]
    if a[i]>0:
        for j in range(a[i]-1):
            dn*=B
    else:
        for j in range(-1*a[i]+1):
            dn*=B
        dn=1/dn
    dn*=pa[i]
    d+=dn
print(d)
d=0.0
for i in range(N):
    dn=1.0
    pa[i]+=1
    pa[i]=1/pa[i]
    if a[i]>0:
        for j in range(a[i]+1):
            dn*=B
    elif a[i]==-1:
        dn=log(B)
    else:
        for j in range(-1*a[i]-1):
            dn*=B
        dn=1/dn
    dn*=pa[i]
    d+=dn
print(d)