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A Classical Problem?
You are given a permutation of $$$n$$$. Build an undirected graph of $$$n$$$ nodes. There is an edge $$$(i,j)$$$ if and only if $$$i<j$$$ and $$$p_i < p_j$$$. Please find the maximum matching of the graph.
I don't know how to do it in $$$O(n \log n)$$$.
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en2 |
|
JianfengZhu | 2023-05-19 11:51:55 | 47 | Tiny change: 'the graph.' -> 'the graph.\n\nI don't know how to do it in $O(n \log n)$.' | |
| en1 |
|
JianfengZhu | 2023-05-19 11:51:17 | 205 | Initial revision (published) |
