n, p = input().split()
n = int(n)
p = float(p)


# def divide(n):
#     res = 0
#     for i in range(1, int(n ** 0.5) + 1):
#         if n % i == 0:
#             if i * i == n:
#                 res += 1
#             else:
#                 res += 2
#     return res


mx = 10 ** 6
num = int(mx ** (1 / 2) + 1)
prod = [1] * (num + 10)
q = 1 - p
for i in range(num + 5):
    prod[i + 1] = prod[i] * q

ans = 0

# for i in range(2, n + 1):
#     yakusu = divide(i)
#     ans += prod[yakusu - 2]
# print(ans)

cnt = [0] * (n + 1)

for i in range(2, n + 1):
    for j in range(n // i + 1):
        if i * (j + 1) <= n:
            cnt[i * (j + 1)] += 1

for i in range(2, n + 1):
    ans += prod[cnt[i] - 1]

print(ans)