#include <stdio.h>
#include <stdlib.h>
int main()
{
long long int result;
int n;
while(~scanf("%d",&n))
{
if(n<1||n>20)
continue;
result=1;
while(n)
result*=n--;
printf("%lld\n",result);
}
return 0;
}
online_judge_1067
最新推荐文章于 2024-05-19 23:56:55 发布
