Leetcode Solution: #206: Reverse Linked List 🐬

class Solution {
 public:
  ListNode* reverseList(ListNode* head) {
    if (!head || !head->next)
      return head;

    ListNode* newHead = reverseList(head->next);
    head->next->next = head;
    head->next = nullptr;
    return newHead;
  }
};