Pola Prostokątów

import java.awt.Rectangle;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/*
 * http://pl.spoj.com/problems/SIL/
 * SIL
 * Pola Prostokątów
 */

class SIL {
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String[] rect1 = in.readLine().split(" ");
        String[] rect2 = in.readLine().split(" ");

        Rectangle a = new Rectangle(Integer.parseInt(rect1[0]),
                        Integer.parseInt(rect1[3]),
                        Math.abs(Integer.parseInt(rect1[2]) - Integer.parseInt(rect1[0])),
                        Math.abs(Integer.parseInt(rect1[1]) - Integer.parseInt(rect1[3])));
        Rectangle b = new Rectangle(Integer.parseInt(rect2[0]),
                        Integer.parseInt(rect2[3]),
                        Math.abs(Integer.parseInt(rect2[2]) - Integer.parseInt(rect2[0])),
                        Math.abs(Integer.parseInt(rect2[1]) - Integer.parseInt(rect2[3])));
        Rectangle c = a.intersection(b);

        int areaA = a.height * a.width;
        int areaB = b.height * b.width;
        int areaC = c.isEmpty() ? 0 : c.width * c.height;

        System.out.println(areaA + areaB - areaC);
    }
}