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Check if the given board is valid Sudoku or not explanation with solution in CPP
- To determine if a 9×9 Sudoku board is valid, we need to check if each row, column, and 3x3 sub-box contains the digits 1-9 without repetition.
- We can use a boolean matrix to keep track of the numbers that have appeared in each row, column, and sub-box.
- Iterate through the board and update the boolean matrix accordingly.
- If there are no duplicates, the Sudoku board is valid.
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