import java.util.*;
import java.math.*;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入
		long w = sc.nextInt();
		long h = sc.nextInt();
		long x = sc.nextInt();
		long y = sc.nextInt();

		double s = w *h;

		System.out.println(s/2);

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

		double s = w *h;

		System.out.println(s/2);

		if(w<2 || h<2){
			System.out.println(0);
		}else if(w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0){
			System.out.println(1);
		}else{
			System.out.println(0);
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入
		long w = sc.nextInt();
		long h = sc.nextInt();
		long x = sc.nextInt();
		long y = sc.nextInt();

		double s = w *h;

		System.out.println(s/2);

		if(w<2 || h<2){
			System.out.println(0);
		}else if(w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0){
			System.out.println(1);
		}else{
			System.out.println(0);
		}
	} main {
		Scanner sc = new Scanner(System.in);
		// 整数の入
		long w = sc.nextInt();
		long h = sc.nextInt();
		long x = sc.nextInt();
		long y = sc.nextInt();

		double s = w *h;

		System.out.println(s/2);

		if(w<2 || h<2){
			System.out.println(0);
		}else if(w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0){
			System.out.println(1);
		}else{
			System.out.println(0);
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long w = sc.nextInt(); w sc.nextInt() sc.nextInt sc long h = sc.nextInt(); h sc.nextInt() sc.nextInt sc long x = sc.nextInt(); x sc.nextInt() sc.nextInt sc long y = sc.nextInt(); y sc.nextInt() sc.nextInt sc double s = w *h; s w *h w h System.out.println(s/2) System.out.println System.out System System.out s/2 s 2 if(w<2 || h<2){
			System.out.println(0);
		}else if(w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0){
			System.out.println(1);
		}else{
			System.out.println(0);
		} w<2 || h<2 w<2 w 2 h<2 h 2 {
			System.out.println(0);
		} System.out.println(0) System.out.println System.out System System.out 0 if(w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0){
			System.out.println(1);
		}else{
			System.out.println(0);
		} w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0 h/2 == y w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0 w/2 == x w/2 w 2 x w%2 == 0 w%2 w 2 0 h/2 == y h/2 h 2 y h%2 == 0 h%2 h 2 0 {
			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);
		// 整数の入
		long w = sc.nextInt();
		long h = sc.nextInt();
		long x = sc.nextInt();
		long y = sc.nextInt();

		double s = w *h;

		System.out.println(s/2);

		if(w<2 || h<2){
			System.out.println(0);
		}else if(w/2 == x && w%2 == 0 && h/2 == y && h%2 == 0){
			System.out.println(1);
		}else{
			System.out.println(0);
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 整数の入
		long w = sc.nextInt();
		long h = sc.nextInt();
		long x = sc.nextInt();
		long y = sc.nextInt();

		double s = w *h;

		System.out.println(s/2);

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

		double s = w *h;

		System.out.println(s/2);

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