Score : $100$ points

Problem Statement

You are given a sequence of three numbers: $A=(A_1,A_2,A_3)$.

Is it possible to rearrange the elements of $A$ into an arithmetic sequence?

In other words, is it possible to rearrange the elements of $A$ so that $A_3-A_2=A_2-A_1$?

Constrains

• $1 \leq A_i \leq 100$
• All values in input are integers.

Input

Input is given from Standard Input in the following format:

$A_1$ $A_2$ $A_3$

Output

If it is possible to rearrange the elements of $A$ into an arithmetic sequence, print Yes; otherwise, print No.

5 1 3

Yes

We can rearrange them into an arithmetic sequence by, for example, making it $(1,3,5)$.

1 4 3

No

There is no way to rearrange them into an arithmetic sequence.

5 5 5

Yes

All elements of $A$ may be equal, or $A$ may be an arithmetic sequence already.