import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		sc.close();

		if (a + c == 0) {
			if (b + d == 0) {
				System.out.println("Yes");
			} else if (b < d) {
				System.out.println("0 " + (b + d) / 2.0);
			} else {
				System.out.println("No");
			}
		} else {
			System.out.println((a + c) / 2.0 + " " + (b + d) / 2.0);
		}
	}
}