remove nth node from end of list one iteration code example

Example: remove nth node from end of list

class Solution {
    public ListNode removeNthFromEnd(ListNode head, int n) {
        
        ListNode slow = head, fast = head;
        int count = 0;
        while(fast != null && fast.next != null){
            fast = fast.next;
            if(count >= n)
                slow = slow.next;
            count++;
        }
        
        if(count+1 == n) return slow.next;
        
        slow.next = slow.next.next;
        return head;
    }
}