Help with segment in a tree problem

Revision en2, by VietCT, 2020-02-19 17:21:02

Hi guys. I have a problem want to ask you guys. Problem: Given a tree with n nodes, m segments in a tree with 2 endpoints. Find the maximum number of segments satisfy that not exist two segments with the paths intersect. (n < 1e3, m < 1e5); My solution (WA passed 4/5) is: Sort m segments by the depth of their LCA. If two segments have the same LCA, if one of them have the endpoint equal to their LCA i choose it ,else i choose the one have shorter length. After sorted, i pick it one by one. My sub

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en8 English VietCT 2020-02-19 20:34:45 10
en7 English VietCT 2020-02-19 20:32:49 56
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en4 English VietCT 2020-02-19 20:28:24 275
en3 English VietCT 2020-02-19 17:21:27 16
en2 English VietCT 2020-02-19 17:21:02 2 Tiny change: 'Hi guys.``\nI have a' -> 'Hi guys.\nI have a'
en1 English VietCT 2020-02-19 17:20:46 576 Initial revision (published)