Well, no, you only need to keep at most one increasing subsequence for each length. In your example, you can forget about the 9, 7, 5, and 3 entirely. Any increasing subsequence beginning with them will be just as long if they begin with the 1 instead.

In reply to Re^3: Puzzle: Longest Increasing Sequence by kaif
in thread Puzzle: Longest Increasing Sequence by TedPride

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