algorithm - Finding at least one common node in two lists with different lengths -

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as title says, i'm looking efficient (not best) way find common node (one enough) in 2 lists.

what know lists is, have 2 lists different lengths , somewhere got common node. point common node is, both lists merge accord each other point.

i haven't written down code , won't because first need sure if way work. makes me unsure step 4:

  1. find out length of first list.

  2. find out length of second list.

  3. take bigger list , subtract smaller list (i call solution x).

  4. take longer list , run through first node x-th node ==> both lists should (!) have same number of nodes.
  5. now can run through both lists simultaneously till found common node.

do think it's ready coded? :)


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