C++ Solution to Coding Challenge 19. Remove Nth Node From End of List
Problem statement
Given the head of a linked list, remove the n-th node from the end of the list and return its head.
Example 1
Input: head = [1,2,3,4,5], n = 2
Output: [1,2,3,5]
Example 2
Input: head = [1], n = 1
Output: []
Example 3
Input: head ...
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