Re: [algogeeks] Re: Largest Path in Tree [SPOJ BENFECT]

2012-06-23 Thread Avinash Jain
no this problem is different from finding the longest path which is
actually maximum number of nodes covered in the longest path

On Sat, Jun 23, 2012 at 5:45 PM, Navin Kumar algorithm.i...@gmail.comwrote:

 Is longest path between two node in a tree is equal two logest path
 between two leaves??


 On Sat, Jun 23, 2012 at 5:35 PM, Navin Kumar algorithm.i...@gmail.comwrote:

 Is this similar to finding the diameter of a tree(longest disteance
 between two leaves) ?? If yes than visit this link

 http://www.cs.duke.edu/courses/spring00/cps100/assign/trees/diameter.html


 On Sat, Jun 23, 2012 at 2:44 PM, Avinash jain.av...@gmail.com wrote:

 Some how I found that we need to run bfs twice to get the largest
 distance between any two nodes of a tree. Please explain me how it works.

 regards,
 avinash

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avinash
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Re: [algogeeks] Re: Largest Path in Tree [SPOJ BENFECT]

2012-06-23 Thread Avinash Jain
you are just finding the diameter of the tree. Remember the graph I am
talking about is weighted. So if two adjacent vertices has infinite weight
than that would be the longest distance between any two vertices in the
graph.

 e.g. In you diagram suppose the sum of weight of the edges from a-b is
30. But in the graph suppose the weight of the left most edge (i.e. 4-6)
is 40 then 4-6 is the longest distance not a-b. Let me know if I am
making sense.

On Sat, Jun 23, 2012 at 3:51 PM, Kumar Vishal kumar...@gmail.com wrote:

  What I can think
   is case is :

   10
  / \
 6 13
/ \
   4   5
  / \   \
 6   7   8
/ \   \
   9   a   b

so from a-b is
  a-7-4-2-5-8-b

  1- Left Tree then
  2- Right Tree
  add them

 On Sat, Jun 23, 2012 at 3:49 PM, Kumar Vishal kumar...@gmail.com wrote:

   What I can think
   is case is :

 1
  / \
 2   3
/ \
   4   5
  / \   \
 6   7   8
/ \   \
   9   a   b

so from a-b is
  a-7-4-2-5-8-b



 On Sat, Jun 23, 2012 at 2:44 PM, Avinash jain.av...@gmail.com wrote:

 Some how I found that we need to run bfs twice to get the largest
 distance between any two nodes of a tree. Please explain me how it works.
 regards,
 avinash

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 Regards
 Kumar Vishal
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 Regards
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avinash
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