import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  }
}
                          import java.util.Scanner; Scanner java.util public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) double w = sc.nextDouble(); w sc.nextDouble() sc.nextDouble sc double h = sc.nextDouble(); h sc.nextDouble() sc.nextDouble sc double x = sc.nextDouble(); x sc.nextDouble() sc.nextDouble sc double y = sc.nextDouble(); y sc.nextDouble() sc.nextDouble sc System.out.println((w*h)/2) System.out.println System.out System System.out (w*h)/2 (w*h) w h 2 if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    } (x == w/2)&&(y == h/2) (x == w/2) x w/2 w 2 (y == h/2) y h/2 h 2 {
      System.out.println("1");
    } System.out.println("1") System.out.println System.out System System.out "1" {
      System.out.println("0");
    } System.out.println("0") System.out.println System.out System System.out "0" String[] args args public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  }
} Main
import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    double w = sc.nextDouble();
    double h = sc.nextDouble();
    double x = sc.nextDouble();
    double y = sc.nextDouble();
    System.out.println((w*h)/2);
    if((x == w/2)&&(y == h/2)){
      System.out.println("1");
    }else{
      System.out.println("0");
    }
  }
}
                         