backtrack.py
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@ -7,7 +7,7 @@ from time import sleep
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# PADDING = int(os.popen('tput cols').read()) // 3 # '// 2 - 6' for exact middle for n=4
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PADDING = 5
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DEBUG = False
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ITER = -1
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# ITER = -1
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def get_board_dim(board: list) -> int:
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return int(len(board) ** 0.5)
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@ -88,16 +88,16 @@ def check_constraint(slice: list, constraint: int) -> bool:
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return True
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def is_valid_state(board: list, border: list, next_candidate_index: int) -> bool:
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global ITER
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# global ITER
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row = get_row(board, next_candidate_index)
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column = get_col(board, next_candidate_index)
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constraints = get_constraints(board, border, next_candidate_index)
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ITER += 1
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if ITER % 100000 == 0:
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os.system('clear')
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print_board(board, border)
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print(f'{ITER=}')
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# ITER += 1
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# if ITER % 100000 == 0:
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# os.system('clear')
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# print_board(board, border)
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# print(f'{ITER=}')
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satisfies_constraints = all([
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check_constraint(column, constraints[0]),
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check_constraint(row, constraints[2]),
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@ -176,6 +176,6 @@ if __name__ == '__main__':
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# main('3 2 2 1 1 2 1 1 4 2 1 2 1 2 2 2') # henri's problem
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# main('2 1 2 3 3 2 3 1 3 2 2 1 3 3 2 3 4 2 1 2') # 5 x 5
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# main('1 2 2 4 3 5 4 4 2 2 2 1 1 2 3 4 2 4 5 3 3 2 2 1') # 6 x 6
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# main('6 3 1 3 3 3 2 1 2 3 3 3 3 3 3 7 3 4 3 2 1 2 1 2 2 3 3 4') # 7 x 7
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main('6 3 1 3 3 3 2 1 2 3 3 3 3 3 3 7 3 4 3 2 1 2 1 2 2 3 3 4') # 7 x 7
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# main('7 4 2 3 3 2 1 1 2 2 2 3 4 6 6 5 4 2 3 2 1 1 2 2 4 2 4 4') # 7 x 7
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main('4 3 4 1 5 4 3 2 2 4 2 4 1 3 5 4 3 3 5 2 3 1 3 2 2 1 2 3 2 4 3 3') # 8 x 8
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# main('4 3 4 1 5 4 3 2 2 4 2 4 1 3 5 4 3 3 5 2 3 1 3 2 2 1 2 3 2 4 3 3') # 8 x 8
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