using System;

public class Program

{

    public static int ComputeArea(int ax1, int ay1, int ax2, int ay2, int bx1, int by1, int bx2, int by2)

    {

        int lbx = Math.Max(ax1, bx1);

        int lby = Math.Max(ay1, by1);

        int rtx = Math.Min(ax2, bx2);

        int rty = Math.Min(ay2, by2);

​

        int xOverlap = rtx - lbx;

        int yOverlap = rty - lby;

        int areaA = (ax2 - ax1) * (ay2 - ay1);

        int areaB =  (bx2 - bx1) * (by2 - by1);

​

        if(xOverlap <= 0 || yOverlap <= 0)

            return areaA + areaB;

        return areaA + areaB - xOverlap * yOverlap;

    }

    public static void Main()

    {

        Console.WriteLine("UniLecs");

        // tests

        Console.WriteLine(ComputeArea(-3, 0, 3, 4, 0, -1, 9, 2).ToString()); // 45

    }

}