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Intersection Node In Two Linkedlist Using Difference Method

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1. Given the heads of two singly linked-lists headA and headB
2. Return the node at which the two lists intersect. 
3. If the two linked lists have no intersection, return null.
Input Format 
Input is managed for you.
Output Format 
Output is managed for you.
Question Video
Constraints 
0 <= N <= 10^6
Sample Input 
4
14 12 8 7 
2
4
7 2 6 5
Sample Output 
8


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