/******************************************************************************
 * This program computes the sum of a list of float values on STDIN.
 * 
 * Copyright © 2016 Richard Lesh.  All rights reserved.
 *****************************************************************************/

import org.pureprogrammer.Utils;

public class TotalFilterFP {

    public static void main(String[] args) {
        String line;
        double d;
        double total = 0;

        while ((line = Utils.getline()) != null) {
            line = Utils.trim(line);
            try {
                d = Double.parseDouble(line);
                total += d;
            } catch (Exception ex) {
                if (Utils.cpLength(line) > 0) {
                    System.out.println(Utils.join("", "Can't parse input: ", line));
                }
            }
        }

        System.out.println(Utils.format("{0:g}", total));
    }
}