Circular Linked list problem

In this question ,I am not able to think how to start. can you send code for this problem or any hints.

have you watch the video “CPP - Linked List Floyd’s Cycle”
there is a video about the same
in which floyd’s algorithm is explain
it is done using floyd’s algorithm

yes sir, i watched this vedio and i already know LL Floyd’s Cycle. But how apply in this question is some problem.

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