#A. ABC201A - Tiny Arithmetic Sequence

Type: Default

1000ms

256MiB

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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.

ABC201

Not Attended

Status: Done
Rule: IOI
Problem: 7
Start at: 2023-6-28 8:00
End at: 2023-6-28 10:00
Duration: 2 hour(s)
Host: 梁泽贤 (liangzexian)
Partic.: 10

#A. ABC201A - Tiny Arithmetic Sequence

ABC201A - Tiny Arithmetic Sequence

Problem Statement

Constrains

Input

Output

Sample Input 1

Sample Output 1

Sample Input 2

Sample Output 2

Sample Input 3

Sample Output 3

ABC201

Status

Development

Support

#A. ABC201A - Tiny Arithmetic Sequence

ABC201A - Tiny Arithmetic Sequence

Problem Statement

Constrains

Input

Output

Sample Input 1

Sample Output 1

Sample Input 2

Sample Output 2

Sample Input 3

Sample Output 3

ABC201

Status

Development

Support

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