from math import factorial

n=int(input())
if n<=100:
    ans=[]
    for i in range(min(len(str(factorial(n))),12)):
        k=str(factorial(n))
        ans.append(k[-(i+1)])
    ans=ans[::-1]
    ans="".join(ans)
    print(ans)

if n>100:
    print("0"*12)