108. Remove Nth Node From End Of List

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Input: head = [1,2,3,4,5], n = 2

Output: [1,2,3,5]

Explanation: The 2nd node from the end is 4. Removing it results in [1,2,3,5].

Input: head = [1], n = 1

Output: []

Explanation: The only node needs to be removed, resulting in an empty list.

Input: head = [1,2], n = 1

Output: [1]

Explanation: The last node needs to be removed, resulting in [1].

Time Complexity

O(n)

Space Complexity

O(1)