class harm{
public static double f(int i){
	double r=1.0/i;
	return r;
	}

public static void Main(){
	int n = (int)1e7;
	System.Console.Write("n={0:E2}\n",n);
	double s=0;
	for(int i=1;i<=n;i=i+1)s+=f(i);
	System.Console.Write("sum={0:G5}\n",s);
	}
}