Determine if a 9×9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: 1. Each row must contain the digits 1-9 without repetition. 2. Each column must contain the digits 1-9 without repetition. 3. Each of the 9 3×3 sub-boxes of the grid must contain the digits … Continue reading Check if the given board is valid Sudoku or not explanation with solution in CPP