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* add median of matrix * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * update * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * fix formating * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Apply suggestions from code review --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Christian Clauss <cclauss@me.com>
39 lines
738 B
Python
39 lines
738 B
Python
"""
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https://en.wikipedia.org/wiki/Median
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"""
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def median(matrix: list[list[int]]) -> int:
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"""
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Calculate the median of a sorted matrix.
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Args:
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matrix: A 2D matrix of integers.
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Returns:
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The median value of the matrix.
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Examples:
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>>> matrix = [[1, 3, 5], [2, 6, 9], [3, 6, 9]]
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>>> median(matrix)
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5
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>>> matrix = [[1, 2, 3], [4, 5, 6]]
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>>> median(matrix)
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3
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"""
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# Flatten the matrix into a sorted 1D list
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linear = sorted(num for row in matrix for num in row)
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# Calculate the middle index
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mid = (len(linear) - 1) // 2
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# Return the median
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return linear[mid]
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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