# -*- coding: utf-8 -*-
"""
No.500 階乗電卓
https://yukicoder.me/problems/no/500

"""
import sys
from sys import stdin
from math import factorial
input = stdin.readline


def slove(N):
    if N < 1000:
        ans = factorial(N)
    else:
        ans = factorial(N % 1000)
    return str(ans)[-12:]


def main(args):
    N = int(input())
    ans = slove(N)
    print(ans)


if __name__ == '__main__':
    main(sys.argv[1:])