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LinkedList

Middle of Linked List

**Problem Statement:** Given the required input arguments, write an efficient algorithm to solve the **Middle of Linked List** problem. Implement the required logic as specified by standard definitions for this classic algorithmic challenge. **Hint / Expected Approach:** Slow/fast pointer (fast moves 2x) **Edge Cases to Consider:** - (1) Single node - (2) Two nodes - (3) Even vs odd length list

Examples

Example 1
Input: [1,2,3,4,5]
Output: Node 3 → [3,4,5]
Explanation: Odd, exact middle
Example 2
Input: [1,2,3,4,5,6]
Output: Node 4 → [4,5,6]
Explanation: Even, second of two middles
Example 3
Input: [1]
Output: Node 1 → [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
  • ▪Even vs odd length list
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