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Remove Nth Node from End of List
- Problem description: Given a linked list, remove the n-th node from the end of the list and return its head.
- Example: Given a linked list: 1->2->3->4->5, and n = 2. After removing the second node from the end, the linked list becomes 1->2->3->5.
- Solution 1: Fast and slow pointer solution
- Solution 2: Two-star or pointer to pointer solution.
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