import java.util.Scanner;

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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 0);
	}
} import java.util.Scanner; Scanner 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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 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(w * (double) h / 2) System.out.println System.out System System.out w * (double) h / 2 w * (double) h w (double) h 2 boolean bool = w == x * 2 && h == y * 2; bool w == x * 2 && h == y * 2 w == x * 2 w x * 2 x 2 h == y * 2 h y * 2 y 2 System.out.println(bool ? 1 : 0) System.out.println System.out System System.out bool ? 1 : 0 bool 1 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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 0);
	}
} Main
import java.util.Scanner;

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(w * (double) h / 2);
		boolean bool = w == x * 2 && h == y * 2;
		System.out.println(bool ? 1 : 0);
	}
}
