Class Solution


  • public class Solution
    extends Object
    143 - Reorder List\. Medium You are given the head of a singly linked-list. The list can be represented as: L0 → L1 → … → Ln - 1 → Ln _Reorder the list to be on the following form:_ L0 → Ln → L1 → Ln - 1 → L2 → Ln - 2 → … You may not modify the values in the list's nodes. Only nodes themselves may be changed. **Example 1:** ![](https://assets.leetcode.com/uploads/2021/03/04/reorder1linked-list.jpg) **Input:** head = [1,2,3,4] **Output:** [1,4,2,3] **Example 2:** ![](https://assets.leetcode.com/uploads/2021/03/09/reorder2-linked-list.jpg) **Input:** head = [1,2,3,4,5] **Output:** [1,5,2,4,3] **Constraints:** * The number of nodes in the list is in the range [1, 5 * 104]. * `1 <= Node.val <= 1000`
    • Constructor Detail

      • Solution

        public Solution()
    • Method Detail

      • reorderList

        public void reorderList​(ListNode head)