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JavaScript/Dynamic-Programming/SudokuSolver.js at master · TheAlgorithms/JavaScript · GitHub
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SudokuSolver.js
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48 lines (44 loc) · 1.31 KB
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JavaScript
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Dynamic-Programming
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SudokuSolver.js
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const
isValid
=
(
board
,
row
,
col
,
k
)
=>
{
for
(
let
i
=
0
;
i
<
9
;
i
++
)
{
const
m
=
3
*
Math
.
floor
(
row
/
3
)
+
Math
.
floor
(
i
/
3
)
const
n
=
3
*
Math
.
floor
(
col
/
3
)
+
(
i
%
3
)
if
(
board
[
row
]
[
i
]
===
k
||
board
[
i
]
[
col
]
===
k
||
board
[
m
]
[
n
]
===
k
)
{
return
false
}
}
return
true
}
const
sudokuSolver
=
(
data
)
=>
{
for
(
let
i
=
0
;
i
<
9
;
i
++
)
{
for
(
let
j
=
0
;
j
<
9
;
j
++
)
{
if
(
data
[
i
]
[
j
]
===
'.'
)
{
for
(
let
k
=
1
;
k
<=
9
;
k
++
)
{
if
(
isValid
(
data
,
i
,
j
,
`
${
k
}
`
)
)
{
data
[
i
]
[
j
]
=
`
${
k
}
`
if
(
sudokuSolver
(
data
)
)
{
return
true
}
else
{
data
[
i
]
[
j
]
=
'.'
}
}
}
return
false
}
}
}
return
true
}
// testing
// const board = [
// ['.', '9', '.', '.', '4', '2', '1', '3', '6'],
// ['.', '.', '.', '9', '6', '.', '4', '8', '5'],
// ['.', '.', '.', '5', '8', '1', '.', '.', '.'],
// ['.', '.', '4', '.', '.', '.', '.', '.', '.'],
// ['5', '1', '7', '2', '.', '.', '9', '.', '.'],
// ['6', '.', '2', '.', '.', '.', '3', '7', '.'],
// ['1', '.', '.', '8', '.', '4', '.', '2', '.'],
// ['7', '.', '6', '.', '.', '.', '8', '1', '.'],
// ['3', '.', '.', '.', '9', '.', '.', '.', '.']
// ]
// sudokuSolver(board) // -> board updated by reference
export
{
sudokuSolver
}
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