﻿ ABC201 A - Tiny Arithmetic Sequence - Atcoder

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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.

### Sample Input 1

5 1 3


### Sample Output 1

Yes


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

### Sample Input 2

1 4 3


### Sample Output 2

No


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

### Sample Input 3

5 5 5


### Sample Output 3

Yes


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