saketkumarsingh's blog

Help required in a Graph Question
By saketkumarsingh, history, 3 years ago, In English

Can someone tell the approach for this interesting question: Question

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3 years ago, hide # |
 
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Correct me if I'm wrong. My first thought for this problem was dp. dp(i) -> maximum posters till i th element in some defined order that works (maybe sort using x and y?) but soon became doubtful if such an order even exists. For all 2 pairs we can find if the 2 posters are overlapping or not. If we create a graph and add edge b/w 2 nodes (posters) if they are NOT overlapping, then we need to find the largest connected component size which is completely connected (edge b/w every pair #E=n(n-1)/2)

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    3 years ago, hide # ^ |
     
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    this is a matching problem , it kinda makes sense that no greedy/dp algorithm would work even if you didnt knew the tags tho.Most of the time if it is a problem about selecting things that are limiting each other by someway and no greedy seems to work, it is a matching problem.You can learn bipartite matching algorithm and then try the problem again

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3 years ago, hide # |
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I keep false solving

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