Intersection of Two Linked Lists Leetcode | Leetcode 160 | Approach + Code | C++

Intersection of Two Linked Lists Leetcode | Leetcode 160 | Approach + Code | C++

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About Video:
This video is about finding the node where two linked list are intersecting together .
watch the video for understanding..

Queries solved in this video:
1)What is the meaning of intersection of two linked list.
2)Explanation of intersection of two linked list through examples.
3)Approach of solving intersection of two linked list.
4)Code for intersection of two linked list in c++.

See video for explanation with example and dry run.

Complexity Analysis:
Time Complexity : O(N)
Space Complexity : O(1)

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[deepanshu.sharmaa]

but if they are not intersection so in that case we return null also, u can't return null anywhere in the code?

[shyamjitiwari]

In first example why they are not intersecting at 1 instead of 8?