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/* ------------------------------------------------------------------ */
/* The Great Computer Language Shootout */
/* http://shootout.alioth.debian.org/ */
/* */
/* Contributed by Anthony Borla */
/* ------------------------------------------------------------------ */
import java.text.DecimalFormat;
import java.text.FieldPosition;
object harmonic
{
def main(args: Array[String])
{
var n = Integer.parseInt(args(0));
var value = harmonic(n, 0.0);
val formatter = new DecimalFormat("#.000000000");
var formattedValue = formatter.format(value, new StringBuffer(), new FieldPosition(0));
System.out.println(formattedValue);
}
final def harmonic(n: Int, a: Double): Double =
if (n == 0) a else harmonic(n - 1, a + 1.0 / n);
}
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