class Lu1
{
    public static void main(String args[]) throws java.io.IOException
    {
        char gl;
        gl=(char)System.in.read();
        double i=100,j=0.0,k,h;
        k=(double)gl;
        h=k/i;        for(i=100;i>=2;i=i-h*i)
        {
            if(i>=2)
            {
                j=j+k;
            }
            else
            {
                break;
             }
        }        j=j+200;
        System.out.println("Lu="+j);
    }
}//缺少;号!!