Remove Nth Node from End of List

Statement

Given a singly linked list, remove the $n^{th}$ node from the end of the list and return its head.

Constraints:

• The number of nodes in the list is k.
• $1\le$ k $\le 10^3$
• $-10^3\le$ Node.value $\le 10^3$
• $1\le$ n $\le$ k

Examples