#include<iostream>
#include <iomanip>
using namespace std;

int main(){
    cout<<"n"<<" "<<"e"<<endl;
    cout<<"-"<<" "<<"-----------"<<endl;
    double m, n;
    m = 0;
    n = 1;
    m = 1;
    cout<<0<<" "<<1<<endl;
    for(int i = 1; i < 10; i++){
        n = 1;
        for(int j = i ; j > 0; j--){
            n = j * n;
        }
        m = m + 1 / n;
        if(i < 3){
            cout<<i<<" "<<setprecision(10)<<m<<endl;
        }else{
            cout<<i<<" "<<fixed<<setprecision(9)<<m<<endl;
        }
    }
}