Introduction
It is now 9:28 PM. One hour 28 minutes after the weekly contest, I was more busy after the contest. The contest lasts 90 minutes, and then I spent another 90 minutes to study discuss. It is most busy time in the week and I enjoyed playing and also learning.
My practice
Here is the code I wrote in the contest. It took me one hour and five submissions in order to pass online judge.
I learned one optimal solution after the contest. Here is the link. I like to write a C# solution as well.
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