Created
May 9, 2022 05:36
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def printsudoku(sudoku): | |
print("\n\n") | |
for i in range(len(sudoku)): | |
line = "" | |
if i == 3 or i == 6: | |
print("---------------------") | |
for j in range(len(sudoku[i])): | |
if j == 3 or j == 6: | |
line += "| " | |
line += str(sudoku[i][j])+" " | |
print(line) | |
print("\n\n") | |
def findNextCellToFill(sudoku): | |
for x in range(9): | |
for y in range(9): | |
if sudoku[x][y] == 0: | |
return x, y | |
return -1, -1 | |
def isValid(sudoku, i, j, e): | |
rowOk = all([e != sudoku[i][x] for x in range(9)]) | |
if rowOk: | |
columnOk = all([e != sudoku[x][j] for x in range(9)]) | |
if columnOk: | |
secTopX, secTopY = 3*(i//3), 3*(j//3) | |
for x in range(secTopX, secTopX+3): | |
for y in range(secTopY, secTopY+3): | |
if sudoku[x][y] == e: | |
return False | |
return True | |
return False | |
def solveSudoku(sudoku, i=0, j=0): | |
i, j = findNextCellToFill(sudoku) | |
if i == -1: | |
return True | |
for e in range(1, 10): | |
if isValid(sudoku, i, j, e): | |
sudoku[i][j] = e | |
if solveSudoku(sudoku, i, j): | |
return True | |
sudoku[i][j] = 0 | |
return False |
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