Anyone know what does the Problem 58. Tic Tac Toe FTW in cody mean?

Question

tqy 2012-8-19

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Given a tic tac toe board:

1 represents X

0 represents empty.

-1 represents O

It is X's move. If there is an immediate win possibility, choose a square for an immediate win. Otherwise return 0.

Return absolute index of the square of choice. If multiple square are valid, return them in order.

Example:

 Input  a = [ 1  0  1
             -1  1  0
              0 -1 -1]
 Output wins is [4 8]

Can anyone explain it in detail?

I'm confused with the sentence I marked ans bold style.

Thanks a lot~~~

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Answer 1

Walter Roberson 2012-8-19

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https://ww2.mathworks.cn/matlabcentral/answers/46302-anyone-know-what-does-the-problem-58-tic-tac-toe-ftw-in-cody-mean#answer_56650

"Absolute index" is "linear index".

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tqy 2012-8-20

Thanks~~~

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Answer 2

Image Analyst 2012-8-19

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https://ww2.mathworks.cn/matlabcentral/answers/46302-anyone-know-what-does-the-problem-58-tic-tac-toe-ftw-in-cody-mean#answer_56655

在 MATLAB Online 中打开

Here are the linear indexes:

4 7
5 8
6 9

They go down columns first, and then across rows from left to right. I don't see how [4 or 8] would be "wins." Indexes 3 and 4 would be a win for "1", while index 3 would be a win for "-1". Are you sure it says 8 is supposed to be a win for X (1)?

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tqy 2012-8-20

http://www.mathworks.com/matlabcentral/cody/problems/58-tic-tac-toe-ftw

This is the original address.

Image Analyst 2012-8-20

It won't let me look at it. " This problem is locked. You need to solve more problems from Cody Challenge group to unlock it." Anyway, did what I say make sense to you?

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