[LeetCode 237] Delete Node in a Linked List
Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3,
the linked list should become 1 -> 2 -> 4 after calling your function.
DiffcultyEasy
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