Wildcards

Lab Java Advanced 30 points

Write static double sum(List<? extends Number> nums) and use it on a List<Integer> and a List<Double>. Print both sums with 2 decimals.

Input

Line 1: integers. Line 2: decimals.

Output

Two lines.

Example

Input

1 2 3
0.5 0.25

Output

6.00
0.75

Sample input available Sample output available

Editor

Java

Hints

A List<Integer> is NOT a List<Number>, but it is a List<? extends Number>.

Solution explanation

? extends lets a method read from lists of any subtype ("producer extends").

Show solution

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    static double sum(List<? extends Number> nums) {
        double total = 0;
        for (Number n : nums) {
            total += n.doubleValue();
        }
        return total;
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        List<Integer> ints = new ArrayList<Integer>();
        for (String t : sc.nextLine().trim().split("\\s+")) {
            ints.add(Integer.parseInt(t));
        }
        List<Double> doubles = new ArrayList<Double>();
        for (String t : sc.nextLine().trim().split("\\s+")) {
            doubles.add(Double.parseDouble(t));
        }
        System.out.printf("%.2f%n", sum(ints));
        System.out.printf("%.2f%n", sum(doubles));
    }
}

Output

Answer