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Reorder List

**Problem Statement:** Given the required input arguments, write an efficient algorithm to solve the **Reorder List** problem. Implement the required logic as specified by standard definitions for this classic algorithmic challenge. **Hint / Expected Approach:** Find mid + reverse second half + interleave **Edge Cases to Consider:** - (1) Single node - (2) Two nodes - (3) Odd vs even length list

Examples

Example 1
Input: [1,2,3,4]
Output: [1,4,2,3]
Explanation: Basic even
Example 2
Input: [1,2,3,4,5]
Output: [1,5,2,4,3]
Explanation: Basic odd
Example 3
Input: [1]
Output: [1]
Explanation: Single node

Constraints

  • ▪The number of nodes in the list is in the range [0, 500]
  • ▪-100 <= Node.val <= 100
  • ▪Solve in-place without copying node structures

Watch Out For Edge Cases

  • ▪Single node
  • ▪Two nodes
  • ▪Odd vs even length list
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