Problem:
Score : 100 points

Problem Statement

Given is a three-digit integer N. Does N contain the digit 7?

If so, print Yes; otherwise, print No.

Constraints

100 \leq N \leq 999

Input

Input is given from Standard Input in the following format:

N

Output

If N contains the digit 7, print Yes; otherwise, print No.

Sample Input 1

117

Sample Output 1

Yes

117 contains 7 as its last digit.

Sample Input 2

123

Sample Output 2

No

123 does not contain the digit 7.

Sample Input 3

777

Sample Output 3

Yes

Solution in Common Lisp (SBCL 2.0.3) (judge verdict: Accepted)

(defun app ()
    (let ((n (read-line))
        (ans "No"))

        (if (or (equal "7" (subseq n 0 1)) (equal "7" (subseq n 1 2)) (equal "7" (subseq n 2 3)))
        (setq ans "Yes"))

    (format t "~A~%" ans)
    )
)

(app)