Problem:
Score : 200 points

Problem Statement

There are some animals in a garden. Each of them is a crane with two legs or a turtle with four legs.

Takahashi says: "there are X animals in total in the garden, and they have Y legs in total." Determine whether there is a combination of numbers of cranes and turtles in which this statement is correct.

Constraints

1 \leq X \leq 100

1 \leq Y \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

X Y

Output

If there is a combination of numbers of cranes and turtles in which the statement is correct, print Yes; otherwise, print No.

Sample Input 1

3 8

Sample Output 1

Yes

The statement "there are 3 animals in total in the garden, and they have 8 legs in total" is correct if there are two cranes and one turtle. Thus, there is a combination of numbers of cranes and turtles in which the statement is correct.

Sample Input 2

2 100

Sample Output 2

No

There is no combination of numbers of cranes and turtles in which this statement is correct.

Sample Input 3

1 2

Sample Output 3

Yes

We also consider the case in which there are only cranes or only turtles.

Solution in Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.Scanner;

import javax.xml.transform.OutputKeys;

public class Main {

	public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt(), y = sc.nextInt();
		boolean ok = false;
		for (int i=0;i<=100;i++) {
			for (int j=0;j<=100;j++) {
				if (i + j == x && i * 2 + j * 4 == y) {
					ok = true;
					break;
				}
			}
		}
		if (ok)
		System.out.println("Yes");
		else 
			System.out.println("No");
	}
}