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