import math

x = int(input())

if x == 2:
    print(1000000)
elif x == 3:
    s = 2 - math.pi ** 2 / 6
    print(int(s * 1e6))
else:
    sum_S = 0.0
    k = 2
    eps = 1e-30  # Very small threshold to ensure precision
    while True:
        log_k = math.log(k)
        log_k_minus_1 = math.log(k - 1)
        log_term = log_k_minus_1 + (x - 1) * log_k
        term = math.exp(-log_term)
        if term < eps:
            break
        sum_S += term
        k += 1
    result = sum_S * 1e6
    print(int(result))