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.
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.
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.
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)
1 <= Number of nodes <= 104
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