Why should you care?

Lists train null checks and in-place rewiring.

See it live — copy this example

Run snippets in a .NET console app, LINQPad, or https://dotnetfiddle.net. Write Big O above every solution.

public class ListNode {
  public int Val; public ListNode Next;
  public ListNode(int v, ListNode next = null) { Val = v; Next = next; }
}
// Remove Nth Node From End

What happened?

• Draw nodes before coding.
• Always handle empty/single-node cases.

Practice next

1. Type the snippet in a C# console or LINQPad.
2. Write Big O on top of your solution.
3. Test empty / single-element edge cases.
4. Add a failing test then fix it.
5. Rename variables to domain words.

Remember

You can code a small C# example for Remove Nth Node From End. You know the complexity class. You tested at least one edge case.

Remove Nth Node From End drill

AlgoVerse interview prompt on remove nth node from end.

Outcome: You recognize the pattern and ship a correct C# sketch.