My Advent of Code solutions in Python.
kevinyap.ca/2019/12/going-fast-in-advent-of-code/
advent-of-code
python
Update day18.py
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2016/day18.py
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2016/day18.py
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import fileinput
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def is_safe(row, x):
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def is_safe(row, i):
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"""Helper function to read out-of-bounds tiles as safe."""
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if x < 0 or x >= len(row):
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return True
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if 0 <= i < len(row):
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return row[i]
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return row[x]
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return True
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def predict_next_row(row):
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"""Given a row, returns the predicted following row."""
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next_row = []
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for i in range(len(row)):
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a, c = is_safe(row, i - 1), is_safe(row, i + 1)
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next_row.append(not (a ^ c))
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return tuple(next_row)
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return [not (is_safe(row, i-1) ^ is_safe(row, i+1)) for i in range(len(row))]
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if __name__ == '__main__':