题解 | #单链表的排序#

using System;
using System.Collections.Generic;

/*
public class ListNode
{
    public int val;
    public ListNode next;

    public ListNode (int x)
    {
        val = x;
    }
}
*/

class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param head ListNode类 the head node
     * @return ListNode类
     */
    public ListNode sortInList (ListNode head) {
        // write code here
        if (head.next == null) return head;
        List<int> list = new List<int>();
        ListNode t = head;
        while (t != null) {
            list.Add(t.val);
            t = t.next;
        }
        list.Sort();
        ListNode res = new ListNode(-1);
        ListNode tail = res;
        for (int i = 0; i < list.Count; i++) {
            ListNode temp = new ListNode(list[i]);
            tail.next = temp;
            tail = temp;
        }
        return res.next;
    }
}