Problem Statement: Given a linked list head pointer, you need to output 1 if the list contains a loop or 0 if it doesn't.
This is two pointer approach. You can also solve this using a HashSet of node addresses to see if same node address appeared again or not.
Function:
This is two pointer approach. You can also solve this using a HashSet of node addresses to see if same node address appeared again or not.
Function:
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