Given pointer to the head of linked list. Determine if it contain a cycle. If it doesn't return 1 otherwise return 0

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Here a linked list which said to contain a cycle if node visit more than once while traversing list. 

 

 

 

 

Given pointer to the head of linked list. Determine if it contain a cycle. If it doesn't return 1 otherwise return 0

Example
head refers to the list of nodes
1→ 2 → 3 – NULL
The numbers shown are the node numbers, not their
data values. There is no cycle in this list so return 0.
head refers to the list of nodes
1- 2 → 3 → 1→ NULL
There is a cycle where node 3 points back to node 1,
so return 1.
Transcribed Image Text:Example head refers to the list of nodes 1→ 2 → 3 – NULL The numbers shown are the node numbers, not their data values. There is no cycle in this list so return 0. head refers to the list of nodes 1- 2 → 3 → 1→ NULL There is a cycle where node 3 points back to node 1, so return 1.
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