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 JavaScript (node.js v5.12) (judge verdict: Runtime Error)

function calc(startA, endA, startB, endB) {
    if (startA <= startB) {
        if (endA <= startB) {
            return 0;
        }
        if (endB <= endA) {
            return endB - startB;
        }
        return endA - startB;
    }
    return calc(startB, endB, startA, endA);
}

function Main(inp) {
    var input = inp.split('\n')[0].split(' ').map(function(n) {
        return Number(n);
    });
    console.log(calc(input[0], input[1], input[2], input[3]));
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));