Introduction
It is a hard level algorithm. I spent over 10 hours to learn a few things. I find out that I have to push myself to learn dynamic programming algorithm and one of ideas is to work on algorithm and data structure more often.
My study
I did write a greedy algorithm, and failed to pass online judge. It took me around one hour. It is a good practice.
I started to work on dynamic programming solution. Here is my discussion link.
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