Problem:
Score : 100 points

Problem Statement

You are given a three-digit positive integer N.

Determine whether N is a palindromic number.

Here, a palindromic number is an integer that reads the same backward as forward in decimal notation.

Constraints

100≤N≤999

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a palindromic number, print Yes; otherwise, print No.

Sample Input 1

575

Sample Output 1

Yes

N=575 is also 575 when read backward, so it is a palindromic number. You should print Yes.

Sample Input 2

123

Sample Output 2

No

N=123 becomes 321 when read backward, so it is not a palindromic number. You should print No.

Sample Input 3

812

Sample Output 3

No

Solution in PHP (5.6.30) (judge verdict: Wrong Answer)

    <?php
    $num = trim(fgets(STDIN));
     
    strval($num);
     
    $check = 0;
    for($i = 0;$i < strlen($num);$i++ ){
    	if($num[$i] == $num[strlen($number)- 1 -$i]){
    		$check = 1;
    	}else{
    		$check = 0;
    		break;
    	}
    }
     
    if($check == 1){
    	echo 'Yes';
    }else{
    	echo 'No';
    }
    ?>