N = int(input())
ans = 1
if N >= 100:
  print("000000000000")
  exit()
flg = 0
for i in range(N,0,-1):
  ans *= i
  s = str(ans)
  if len(s) > 12:
    ans = int(s[len(s)-12:])
    flg = 1
if flg:
  s = str(ans)
  while len(s) < 12:
    s = "0"+s
  print(s)
else:
  print(ans)