// sum_euler.js 4/29/03 by M.Inamori

import System;

var t : int = Environment.TickCount;
var sum : double = 0.0;
for(var i : int = 1; i <= 1000000000; i++)
	sum += 1.0 / double(i);
print(sum);
print((Environment.TickCount - t) + "ms");