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 PHP (7.4.4) (judge verdict: Accepted)

<?php
$n = str_split(fgets(STDIN));

$ans = 'No';
for ($i = 0; $i < 3; $i++) {
  if ($n[$i] == 7) {
    $ans = 'Yes';
  }
}
echo $ans;