x = int(input())

if x == 2:
    print(1000000)
elif x >= 31:
    term = 1.0 / (2 ** (x - 1))
    total = term * 1e6
    print(int(total))
else:
    sum_val = 0.0
    k = 2
    while True:
        denominator = (k ** (x - 1)) * (k - 1)
        term = 1.0 / denominator
        new_sum = sum_val + term
        if new_sum == sum_val:
            break
        sum_val = new_sum
        k += 1
    total = sum_val * 1e6
    print(int(total))