题目：有效的数独
link: https://leetcode.cn/problems/valid-sudoku/description/?envType=study-plan-v2&envId=top-interview-150
def isValidSudoku(self, board: List[List[str]]) -> bool:rows = [[0 for i in range(9)] for j in range(9)]coloumns = [[0 for i in range(9)] for j in range(9)]sub = [[[0 for _ in range(9)] for i in range(3)] for j in range(3)]for i in range(9):for j in range(9):ss = board[i][j]if ss!=".":index = int(ss) - 1rows[i][index] += 1coloumns[j][index] += 1# print(i//3,j//3,index)sub[i//3][j//3][index] += 1if(rows[i][index]>1 or coloumns[j][index]>1 or sub[i//3][j//3][index]>1):# print(rows,coloumns,sub)return Falsereturn True```
