import sys sys.setrecursionlimit(10**7) def I(): return int(sys.stdin.readline().rstrip()) def MI(): return map(int,sys.stdin.readline().rstrip().split()) def LI(): return list(map(int,sys.stdin.readline().rstrip().split())) def LI2(): return list(map(int,sys.stdin.readline().rstrip())) def S(): return sys.stdin.readline().rstrip() def LS(): return list(sys.stdin.readline().rstrip().split()) def LS2(): return list(sys.stdin.readline().rstrip()) x = I() if x == 2: print(10**6) exit() ans = 0 for i in range(2,10000): if pow(i,x-1) <= 10**18: ans += (1/(i**(x-1)))/(i-1) else: break print(int(ans*10**6))