Given a singly linked list consisting of N nodes. The task is to remove duplicates (nodes with duplicate values) from the given list (if exists). Note: Try not to use extra space. Expected time complexity is O(N). The nodes are arranged in a sorted way.
Example 1:
Input:
LinkedList: 2->2->4->5
Output: 2 4 5
Explanation: In the given linked list
2 ->2 -> 4-> 5, only 2 occurs more
than 1 time.
Example 2:
Input:
LinkedList: 2->2->2->2->2
Output: 2
Explanation: In the given linked list
2 ->2 ->2 ->2 ->2, 2 is the only element
and is repeated 5 times.
Your Task:
The task is to complete the function removeDuplicates() which should remove the duplicates from linked list and return the head of the linkedlist.
Expected Time Complexity : O(N) Expected Auxilliary Space : O(1)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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