public class Solution {
    private static ArrayList<Double> list = new ArrayList<Double>();
    public static void main(String[] args) {
        try
        {
            readData();
        }
        catch(IOException io){
            io.printStackTrace();
        }
    }

    public static void readData() throws IOException{
        try {
            BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));

            while (true) {
                list.add(Double.parseDouble(buff.readLine()));
            }
        }

        catch (NumberFormatException nfe){
            for (int i = 0; i < list.size(); i++)
                System.out.println(list.get(i));
        }
    }
}