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();

		long h = (long) (a - c) * (a - c) - 8 * (b - d);
		if (h == 0) {
			System.out.println("Yes");
		} else if (h < 0) {
			System.out.println("No");
		} else {
			System.out.println((a + c) / 2.0 + " " + (b + d) / 2.0);
		}
	}
}