NYOJ28

#include<iostream>
using namespace std;
int main()
{
int m,i,j,h,p=0,a[200000]={1};
cin>>m;
for(i=2;i<=m;i++)
{
h=0;
for(j=0;j<=p;j++)
{
a[j]=(i*a[j])+h;
h=a[j]/10;
a[j]=a[j]%10;
}
while(h>0)
{ 
p++;
a[p]=h%10;
h/=10;
}
}
for(i=p;i>=0;i--)
cout<<a[i];
cout<<endl;
 }