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();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(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();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(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();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(0);
        }


    } main {

        Scanner sc = new Scanner(System.in);

        int w = sc.nextInt();
        int h = sc.nextInt();

        int x = sc.nextInt();
        int y = sc.nextInt();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(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 double sqr = (double)w*h/2; sqr (double)w*h/2 (double)w*h (double)w h 2 System.out.println(sqr) System.out.println System.out System System.out sqr if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(0);
        } (w%2!=0)|(h%2!=0) (w%2!=0) w%2 w 2 0 (h%2!=0) h%2 h 2 0 {
            System.out.println(0);
        } System.out.println(0) System.out.println System.out System System.out 0 if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(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.print(1);
            } System.out.print(1) System.out.print System.out System System.out 1 {
            System.out.print(0);
        } System.out.print(0) System.out.print 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();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(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();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(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();

        double sqr = (double)w*h/2;
        System.out.println(sqr);

        if ((w%2!=0)|(h%2!=0)){
            System.out.println(0);
        } else if ((x==w/2)&(y==h/2)){
                System.out.print(1);
            } else {
            System.out.print(0);
        }


    }
}

