Problem:
Score : 100 points

Problem Statement

You are given three integers A, B and C.

Determine if there exists an equilateral triangle whose sides have lengths A, B and C.

Constraints

All values in input are integers.

1 \leq A,B,C \leq 100

Input

Input is given from Standard Input in the following format:

A B C

Output

If there exists an equilateral triangle whose sides have lengths A, B and C, print Yes; otherwise, print No.

Sample Input 1

2 2 2

Sample Output 1

Yes

There exists an equilateral triangle whose sides have lengths 2, 2 and 2.

Sample Input 2

3 4 5

Sample Output 2

No

There is no equilateral triangle whose sides have lengths 3, 4 and 5.

Solution in Common Lisp (SBCL 1.1.14) (judge verdict: Accepted)

(defun solve (a b c)
  (if (= a b c)
      "Yes"
      "No"))

(defun main ()
  (let ((a (read))
        (b (read))
        (c (read)))
    (format t "~A~%" (solve a b c))))

(main)