import math
import decimal

decimal.getcontext().prec=1000

def zeta(n):
    if n==3:
        return decimal.Decimal(0.202056903159594)
    else:
        ret=decimal.Decimal(0)
        for i in range(2,200):
            ret+=decimal.Decimal(1)/decimal.Decimal(i**n)
        return ret

n=int(input())
if n>=30:
    print(0)
elif n==2:
    print(999999)
else:
    ans=decimal.Decimal(0)
    for i in range(n,100):
        ans+=zeta(i)
    print(int(ans*decimal.Decimal(10**6)))