#include <iostream>
#include <iomanip>
using namespace std;
int xxx(int i)
{
int xx=1;
while(i>0)
{
xx*=i;
i--;
}
return xx;
}
int main()
{
cout<<"n e"<<endl;
cout<<"- -----------"<<endl;
double sum=0.0;
for(int i=0;i<=9;i++)
{
sum+=1./xxx(i);
if(i==8) cout<<i<<" "<<setprecision(10)<<sum<<"0"<<endl; //补个0
if(i!=8)
cout<<i<<" "<<setprecision(10)<<sum<<endl;
}
return 0;
}