import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int h = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((long) w * h / 2.0);
		if (x * 2 == w && y * 2 == h) {
			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) throws Exception {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int h = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((long) w * h / 2.0);
		if (x * 2 == w && y * 2 == h) {
			System.out.println(1);
		} else {
			System.out.println(0);
		}
	}
} Main public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int h = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((long) w * h / 2.0);
		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();
		sc.close();

		System.out.println((long) w * h / 2.0);
		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 sc.close() sc.close sc System.out.println((long) w * h / 2.0) System.out.println System.out System System.out (long) w * h / 2.0 (long) w * h (long) w h 2.0 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) throws Exception {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int h = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((long) w * h / 2.0);
		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) throws Exception {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int h = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((long) w * h / 2.0);
		if (x * 2 == w && y * 2 == h) {
			System.out.println(1);
		} else {
			System.out.println(0);
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int h = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((long) w * h / 2.0);
		if (x * 2 == w && y * 2 == h) {
			System.out.println(1);
		} else {
			System.out.println(0);
		}
	}
}
