import java.util.Scanner;

public class Main {
	public static void main(String [] args) {
		Scanner scanner = new Scanner(System.in);
		long W = scanner.nextLong();
		long H = scanner.nextLong();
		long x = scanner.nextLong();
		long y = scanner.nextLong();
		System.out.println(W*H/2.0);
		if(2*x == W && 2*y == H) {
			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