19. Remove Nth Node From End of List

/**
* Definition for singly-linked list.
* public class ListNode {
*     int val;
*     ListNode next;
*     ListNode(int x) { val = x; }
* }
*/
public class Solution {
public ListNode removeNthFromEnd(ListNode head, int n) {
ListNode temp = head;
int length = getlength(temp);
if(length==n)
{
head = head.next;
return head;
}
int t = 0;
while(t<n)
{
temp = temp.next;
t++;
}
ListNode cur = head;
while(temp.next!=null)
{
cur = cur.next;
temp = temp.next;
}
cur.next = cur.next.next;
return head;
}
int getlength(ListNode temp){
int length = 1;
while(temp.next!=null)
{
temp = temp.next;
length++;
}
return length;
}
}