>>299
求めるオーダーは
(n/10000)・(1/2!)(n/5000)・(1/3!)(n/2000)・(1/4!)(n/1000)・(1/5!)(n/500)・(1/6!)(n/100)・(1/7!)(n/50)・(1/8!)(n/10)・(1/9!)(n/5)