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