NVIDIA Interview Question for Software Engineer / Developers






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Use hare and tortoise approach to detect loop

- jyoti July 29, 2008 | Flag Reply
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1> Visited flag :-
Have a visited flag in each node of the linked list. Flag it as visited when you reach the node. When you reach a node and the flag is already flagged as visited, then you know there is a loop in the linked list.
2> Fastest method: hare & tortoise
Have 2 pointers to start of the linked list. Increment one pointer by 1 node and the other by 2 nodes. If there's a loop, the 2nd pointer will meet the 1st pointer somewhere. If it does, then you know there's one.

- jyoti July 29, 2008 | Flag Reply
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floyed cycle detecting method

- jay99 November 24, 2008 | Flag Reply


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