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CEOI 2008 Day 1 Information
By Benq, history, 5 years ago, In English

Does anyone have a $$$O(V^2)$$$ solution to this problem (available here)? The spoiler describes one but I don't understand what it means when it says to "search for this path backwards," and I can't find a model solution. (However, an $$$O(EV)$$$ solution with bitset did pass ...)

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5 years ago, # |
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Send $5500 and I'll help!

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5 years ago, # |
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Not even one can answer Benq Question! Benqosity

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5 years ago, # |
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I don't have an easy solution, but the following paper provide (somewhat sophisticated) $$$O(V^2)$$$ solutions:

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    5 years ago, # ^ |
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    Thanks!

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    5 years ago, # ^ |
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    There is a simplified document for the second paper. It also claims to run in $$$O(kE \log V)$$$. Shoutout to rpeng. Link

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