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Segregate 012 Node Of Linkedlist Over Swapping Nodes

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1. Given a singly linklist, Segregate 012 Node of LinkedList and return pivot node of linkedlist.
2. After segregation zero nodes should come first and then ones node followed by two's nodes.
Input Format 
1->0->1->0->0->1->2->1->1->1->2->1->1->null
Output Format 
0->0->0->1->1->1->1->1->1->1->1->2->2->null
Question Video
Constraints 
-10^6 <= size Of LinkedList <= 10^6
Sample Input 
17
2 2 0 2 1 0 0 2 2 1 2 1 2 0 1 0 0
Sample Output 
0 0 0 0 0 0 1 1 1 1 2 2 2 2 2 2 2


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