WeAthFoLD

class Solution {
    func isPalindrome(_ x: Int) -> Bool {
        var y: String = x.description
        if x < 0 {
            return false
        }
        var count = y.characters.count
        
        for i in 0..<count/2{
            guard y.characters.removeFirst() == y.characters.removeLast() else{

WeAthFoLD

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) { val = x; }
 * }
 */
public class Solution {
    public ListNode deleteDuplicates(ListNode head) {