LeetCode解題筆記36 Valid Sudoku
題目：
Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.
The Sudoku board could be partially filled, where empty cells are filled with the character '.'.
A partially filled sudoku which is valid.
Note:
A valid Sudoku board (partially filled) is not necessarily solvable. Only the filled cells need to be validated.
python解法一：
def isValidSudoku(self, board): seen = set() return not any(x in seen or seen.add(x) for i, row in enumerate(board) for j, c in enumerate(row) if c != '.' for x in ((c, i), (j, c), (int(i/3), int(j/3), c)))
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