// SumDouble.java

public class SumDouble {

    public static void main(String[] args) {
        double sum = 0; // int -> double
        for (String argument : args) {
            StringBuilder number = new StringBuilder();
            for (char c : argument.toCharArray()) {
                if (!Character.isWhitespace(c)) {
                    number.append(c);
                } else {
                    if (!number.isEmpty()) {
                        sum += Double.parseDouble(number.toString()); // Integer.parseInt -> Double.parseDouble())
                    }
                    number = new StringBuilder();
                }
            }

            if (!number.isEmpty()) {
                sum += Double.parseDouble(number.toString()); // Integer.parseInt() -> Double.parseDouble()
            }
        }

        System.out.println(sum);
    }
}