2023蓝桥杯大赛省赛Java大学B组 矩形总面积

 
import java.util.Scanner;
 
public class Main{
  public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    
    //键入数值
    long x1=sc.nextLong();
    long y1=sc.nextLong();
    long x2=sc.nextLong();
    long y2=sc.nextLong();
    long x3=sc.nextLong();
    long y3=sc.nextLong();
    long x4=sc.nextLong();
    long y4=sc.nextLong();
    //计算两矩阵面积之和
    long s=(x2-x1)*(y2-y1)+(x4-x3)*(y4-y3);
    //计算重叠面积
    //画图找规律
    long a=Math.max(0, Math.min(x2, x4)-Math.max(x1, x3));
    long b=Math.max(0, Math.min(y2, y4)-Math.max(y1, y3));
    //输出结果
    System.out.print(s-a*b);
  }
}