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: Wrong Answer)

$n = fgets(STDIN);
$arr = str_split($n);
$arr0 = $arr[0];
$arr1 = $arr[1];
$arr2 = $arr[2];

if($arr0 == 7){
  echo 'Yes';
  }
  elseif($arr1 == 7){
  echo 'Yes';
  }
  elseif($arr2 == 7){
  echo 'Yes';
  }
  else{
  echo 'No';
  }