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35 lines
835 B
35 lines
835 B
6 months ago
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n = 8
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def generateBoard():
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board = list()
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for i in range(n):
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row[queens[i]] = "Q"
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board.append("".join(row))
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row[queens[i]] = "."
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return board
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def backtrack(row: int):
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if row == n:
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board = generateBoard()
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solutions.append(board)
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else:
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for i in range(n):
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if i in columns or row - i in diagonal1 or row + i in diagonal2:
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continue
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queens[row] = i
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columns.add(i)
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diagonal1.add(row - i)
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diagonal2.add(row + i)
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backtrack(row + 1)
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columns.remove(i)
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diagonal1.remove(row - i)
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diagonal2.remove(row + i)
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solutions = list()
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queens = [-1] * n
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columns = set()
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diagonal1 = set()
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diagonal2 = set()
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row = ["."] * n
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backtrack(0)
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print(solutions)
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