Remove Duplicate From Sorted Linkedlist

easy
Question Solve Solutions 
1. You are give a single sorted linkedlist of numbers. 
2. remove all duplicate nodes such that duplicate numbers appear once and Return the remaning linked list.

Input Format

1->1->1->4->5->6->6->7->8->9->9->9->null

Output Format

1->4->5->6->7->8->9->null

Constraints

0 <= N <= 10^6

Notice

Try First, Check Solution later

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2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input
12
1 1 1 4 5 6 6 7 8 9 9 9
Output
1 4 5 6 7 8 9
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Remove All Duplicates From Sorted Linkedlist

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