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 C (GCC 9.2.1) (judge verdict: Wrong Answer)

#include<stdio.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#include <math.h>
int main(){
  int X,Y;
  scanf("%d %d", &X, &Y);
  double sum =(double)((4*X)-Y) / 2 ;
  if (X == Y){
      printf("No\n");
  } else if(ceil(sum ) != floor(sum )){
      printf("No\n");
      } else if (sum < 0){
        printf("No\n");
      } else{
        printf("Yes\n");
      }
     // printf("%lf\n",sum );
  return 0;
}