>ExpInterview_

Remove Nth Node From End Of List

Medium
LinkedListTwo PointersLinked List

Remove Nth Node From End of List

Given the head of a linked list, remove the n-th node from the end of the list and return its head.

Example 1:

Input: head = [1,2,3,4,5], n = 2
Output: [1,2,3,5]

Example 2:

Input: head = [1], n = 1
Output: []

Examples

Input: n = 2, head = [1,2,3,4,5]
Output: [1,2,3,5]
Input: n = 1, head = [1]
Output: []
Input: n = 1, head = [1,2]
Output: [1]

Constraints

  • •The number of nodes in the list is sz.
  • •1 <= sz <= 30
  • •0 <= Node.val <= 100
  • •1 <= n <= sz