题解 | #链表中倒数最后k个结点#

import java.util.*;

public class Solution {
    public ListNode FindKthToTail (ListNode pHead, int k) {
        // write code here
        ListNode curr = pHead;
        int size = 0;
        if(curr == null)
            size =0;
        else{
            while(curr != null){
                size++;
                curr = curr.next;
            }
        }
        if(size<k){
            return null;
        }
        int yu = size - k;
        int ss = 0;
        while(true){
            if(ss!=yu){
                pHead = pHead.next;
                ss++;
            }else{
                return pHead;
            }
        }
    }
}