def factorial(num):
    if num == 1:
        return 1
    else:
        return num * factorial(num-1)
                    
N = int(input())
ans = 1
if N <= 14:
    ans = factorial(N)
elif N >= 15:
    for i in range(2,N+1):
        ans *= i
        if ans >= 10**12:
            s = list(str(ans)[-12:len(str(ans))])
            ans = int(''.join(s))
print(ans)