题目：
36. Valid Sudoku
Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules:
- Each row must contain the digits
1-9without repetition. - Each column must contain the digits
1-9without repetition. - Each of the 9
3x3sub-boxes of the grid must contain the digits1-9without repetition.
算法思路：
判断每行每列每个九宫格是否出现重复数字：设立一个列表，用于标记1-9数字出现的次数，出现的时候，在列表中对应的索引处加一，同时判断若该数字出现次数超过一次，则返回flase. 如果每行每列每个九宫格都没有重复数字，则返回true。
代码展示：
def
isValidSudoku(
self,
board):
"""
:type board: List[List[str]]
:rtype: bool
"""
temp
=
[]
for i
in
range
(
10
):
temp.
append
(
0
)
#判断每行是否有重复数字
for i
in board:
tmp
= temp
[::
]
for j
in
range
(
9
):
if i
[j
]
!=
'
.
':
tmp
[
int
(i[j] )]
+=
1
if tmp
[
int
(i[j])]
>
1:
return
False
#判断每列是否有重复数字
for j
in
range
(
9
):
tmp
= temp
[::
]
for i
in
range
(
9
):
if board
[i
][j
]
!=
'
.
':
tmp
[
int
(board[i][j] )]
+=
1
if tmp
[
int
(board[i][j] )]
>
1:
return
False
#判断每个九宫格是否有重复数字
for i
in
range
(
3
):
i
*=
3
for j
in
range
(
3
):
j
*=
3
tmp
= temp
[::
]
for k
in
range
(i,
3
+
i):
for l
in
range
(j,j
+
3
):
if board
[k
][l
]
!=
'
.
':
tmp
[
int
(board[k][l])]
+=
1
if tmp
[
int
(board[k][l])]
>
1:
return
False
return
True
结果展示：
