#include <iostream>
#include <iomanip>
using namespace std;
int i;
double a[10],s[10];
int jie(int n)
{
	int sum=1;
	for(int i1=1;i1<=n;i1++)
	{
		sum=sum*i1;
	}
	return sum;
}
double add(double p[],int n)
{
	double sum;
	for(int i2=0;i2<=n;i2++)
		sum+=p[i2];
	return sum;
}

void main()
{
	a[0]=1;
	for(i=1;i<10;i++)
	{
		a[i]=(double)1/jie(i);
	}
	cout<<"n e"<<endl;
	cout<<"- -----------"<<endl;
	for(i=0;i<10;i++)
	{
		s[i]=add(a,i);
	}
	for(i=0;i<3;i++)
	{
		cout<<i<<" "<<s[i]<<endl;
	}
	for(i=3;i<10;i++)
	{
		cout<<i<<" "<<setiosflags(ios::fixed)<<setprecision(9)<<s[i]<<endl;
	}
}

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