Problem Statement

You are given $N integers A _ 1,A _ 2,\ldots,A _ N$.
If their values are all equal, print Yes; otherwise, print No.

Input

The input is given from Standard Input in the following format:
N
$A _ 1 A _ 2 \ldots A _ N$

Output

Print a single line containing Yes if the values of the given $A _ 1,A _ 2,\ldots,A _ N$ are all equal, and No otherwise.

Constraints

• $2\leq N\leq100$
• $1\leq A _ i\leq100$\ $(1\leq i\leq N)$
• All input values are integers.

Sample Input 1

3
3 2 4

Sample Output 1

No

We have $A _ 1\neq A _ 2$, so you should print No.

Sample Input 2

4
3 3 3 3

Sample Output 2

Yes

We have A _ 1=A _ 2=A _ 3=A _ 4, so you should print Yes.

Sample Input 3

10
73 8 55 26 97 48 37 47 35 55

Sample Output 3

No

见题面 Input 部分

见题面 Output 部分