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 Kotlin (1.3.71) (judge verdict: Wrong Answer)

fun main(args: Array<String>) {
  val (X, Y) = readLine()!!.split(" ").map{it.toInt()}
  
  val tartleLegNum = X * 4

  fun calcLegNum(tartleLegNum: Int, totalLegNum: Int = Y): String {
    if(tartleLegNum < 1){
      return "No"
    }
    
    return if(tartleLegNum == totalLegNum) "Yes" else calcLegNum(tartleLegNum - 2, totalLegNum)
  }
  
  val result = if(Y % 2 != 0 || tartleLegNum < Y) "No" else calcLegNum(tartleLegNum)
  
  println(result)
}