Remove Duplicates from Sorted List
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Easy•linked-list•Expected: O(n) time, O(1) space
sorting
Problem
Given the head of a sorted linked list, delete all duplicates such that each element appears only once.
Example 1:
Input: head = [1, 1, 2]
Output: [1, 2]
Example 2:
Input: head = [1, 1, 2, 3, 3]
Output: [1, 2, 3]
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