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Discussion on: Use Backtracking Algorithm to Solve Sudoku

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ngochang29397 profile image
jelly • Edited

Thank you very much for the useful article
Could you please explain more about the number 3 in the code, I could not figure out where you get that number from?

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kunal__satpute profile image
Kunal Satpute

It's a 9 x 9 matrix and each boxes are 3 x 3.