Doddy -- I think the last two columns of y_correct in problem 4 are incorrect.
@William , I think it is correct.
Binbin -- Yes, I see. It's just a more difficult problem than I thought it was!
@William， Yes. It is hard to guess the author's thoughts
Find out sum of all elements of given Matrix
Binary code (array)
calculate the length of matrix
Find Logic 8
Number Puzzle - 092
Number Puzzles - 014
Splitting Hexagon - Problem the second
Splitting Hexagon - Problem the first
Number Puzzle - 095
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