How to determine whether a linked list contains a loop?
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by ET
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Published on 2010-06-08T22:13:42Z
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2010/06/08
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During a preparation for a job interview, I encountered the following question:
How can you determine whether a linked list (of any type) contains a loop, using additional space complexity of O(1)? You cannot assume that the loop starts at the first node (and of course, the loop doesn't have to contain all nodes).
I couldn't find the answer, though I have the feeling it's quite simple...
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