Fear_Is_An_Illusion's blog

will modify dijsktra work for this problem ?
By Fear_Is_An_Illusion, history, 11 years ago, In English

hello, in this sum question I have been trying to implement a modified dijsktra but fail. I just want to know if modified dijsktra work here.

please don't give further hints

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11 years ago, hide # |
 
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I am not sure what you mean by modified Dijkstra,
but I did solve it with Dijkstra.

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    11 years ago, hide # ^ |
     
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    thanks, i will try more .. modified dijsktra means it has slight modification .. okay sorry if it confuses

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      11 years ago, hide # ^ |
       
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      Good luck :)

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        11 years ago, hide # ^ |
        ← Rev. 2  
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        so, earlier I was trying to just use some kind of hash to track the weights. but then I realised, I could just stotre the nodes of shortest path and take 2 consecutive nodes and mark the precomputed hashng of edges with those 2 vertices as true.. then just print indices of vertices which are false after getting all shortest paths..

        what did u do

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          11 years ago, hide # ^ |
          ← Rev. 4  
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          My solution doesn't have hashing actually.

          What I did was: do a All-Pairs Shortest Path by using Dijkstra V times.
          Then I enumerate through each edge, and see if the shortest path between any pairs of nodes pass that edge.

          The whole solution works in O(V3 + E * V2).
          The complexity is kind of lousy, but we have 8 minutes to work with.

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