LeetCode – Valid Sudoku (Java)

Determine if a Sudoku is valid. The Sudoku board could be partially filled, where empty cells are filled with the character ‘.’. Java Solution public boolean isValidSudoku(char[][] board) { if (board == null || board.length != 9 || board[0].length != 9) return false; // check each column for (int i = 0; i < 9; … Read more