Floyd Cycle Linked List

sir i am not able to understand , why i am not able to detect cycle from my code .
Maybe it is because i am adding the next node in head rater than tail. But i can’t understand the logic if it is due to this .

Code-> https://ide.codingblocks.com/s/602278

Hi… go through this https://ide.codingblocks.com/s/602284

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