u Calculate e (UVALive 2083, HDU 1012, ZOJ 1113, POJ 1517, Regionals 2000 >> North America - Greater NY)

///     Raihan Ruhin
///     CSE, Jahangirnagar University.
///     Dhaka-Bangladesh.
///     id: raihanruhin (topcoder / codeforces / codechef / uva / uvalive / spoj), 3235 (lightoj)
///     mail: raihanruhin@ (yahoo / gmail / facebook)
///     blog: ruhinraihan.blogspot.com

#include<bits/stdc++.h>
using namespace std;

#define SET(a) memset(a,-1,sizeof(a))
#define CLR(a) memset(a,0,sizeof(a))
#define PI acos(-1.0)

#define MOD 1000000007
#define MX 100010


int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int tc, kk=1, n;
    string s;
    char ch;
    double denominator = 1, sum=0.0;
    cout<<"n e\n";
    cout<<"- -----------\n";
    for(int i=0;i<10;i++)
    {
        if(i>1) denominator*=(double)i;
        sum+=1.0/denominator;
        cout<<i<<" "<<setprecision(9)<<fixed<<sum<<"\n";
        //cout<<i<<" "<<sum<<"\n";
    }

return 0;
}