import System;
import System.Collections;

var t : int = Environment.TickCount;
var n : int = 200000;
var a : ArrayList = new ArrayList();
a.Add(1);
a.Add(1);
for(var i : int = 0; i < n; i++)
	a.Add(a[i+1] + 1 / a[i]);
print(a[n+1]);
print((Environment.TickCount - t) + "ms");