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51 lines (33 loc) · 653 Bytes
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21.java
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51 lines (33 loc) · 653 Bytes
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/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
class Solution {
public ListNode getKthFromEnd(ListNode head, int k) {
if(head==null)
{
return head;
}
ListNode p=head;
while(k!=1)
{
if(p.next==null)
{
return head;
}
p = p.next;
k--;
}
ListNode q = head;
while(p.next!=null)
{
p = p.next;
q = q.next;
}
return q;
}
}