N = int(input())
if N >= 60:
    print("0"*12)
else:
    ans = 1
    for i in range(2, N+1):
        ans = (ans * i) % (10**12)
    if N >= 15:
        ans = str(ans)
        print("0"*(12-len(ans)) + ans)
    else:
        print(ans)