import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		long w=sc.nextLong(),h=sc.nextLong();
		int x=sc.nextInt(),y=sc.nextInt();
		sc.close();
		System.out.printf("%.10f\n",(double)w*h/2);
		if(x==(double)w/2 && y==(double)h/2) System.out.println("1");
		else System.out.println("0");
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz