From a415a953c3f1bb741f14a4ba06f067e6d94653ed Mon Sep 17 00:00:00 2001 From: Ankana Pari <143877643+ankana2113@users.noreply.github.com> Date: Sun, 9 Mar 2025 03:05:07 +0530 Subject: [PATCH 1/3] Add largest rectangle histogram (#12269) * added ridge regression * added ridge regression * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * added ridge regression * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * ridge regression * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * resolved errors * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * resolved conflicts * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * added doctests * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * ruff and minor checks * minor chenges * minor checks * minor checks * minor changes * descriptive names * Fix ruff check in loss_functions.py * fixed pre-commit issues * added largest rectangle histogram function * added largest rectangle histogram function * Update frequent_pattern_growth.py * Update loss_functions.py * Delete machine_learning/ridge_regression/__init__.py * Delete machine_learning/ridge_regression/ADRvsRating.csv * Delete machine_learning/ridge_regression/ridge_regression.py * Delete machine_learning/ridge_regression/test_ridge_regression.py --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Maxim Smolskiy --- .../stacks/largest_rectangle_histogram.py | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 data_structures/stacks/largest_rectangle_histogram.py diff --git a/data_structures/stacks/largest_rectangle_histogram.py b/data_structures/stacks/largest_rectangle_histogram.py new file mode 100644 index 000000000000..7575bd9f628d --- /dev/null +++ b/data_structures/stacks/largest_rectangle_histogram.py @@ -0,0 +1,39 @@ +def largest_rectangle_area(heights: list[int]) -> int: + """ + Inputs an array of integers representing the heights of bars, + and returns the area of the largest rectangle that can be formed + + >>> largest_rectangle_area([2, 1, 5, 6, 2, 3]) + 10 + + >>> largest_rectangle_area([2, 4]) + 4 + + >>> largest_rectangle_area([6, 2, 5, 4, 5, 1, 6]) + 12 + + >>> largest_rectangle_area([1]) + 1 + """ + stack: list[int] = [] + max_area = 0 + heights = [*heights, 0] # make a new list by appending the sentinel 0 + n = len(heights) + + for i in range(n): + # make sure the stack remains in increasing order + while stack and heights[i] < heights[stack[-1]]: + h = heights[stack.pop()] # height of the bar + # if stack is empty, it means entire width can be taken from index 0 to i-1 + w = i if not stack else i - stack[-1] - 1 # calculate width + max_area = max(max_area, h * w) + + stack.append(i) + + return max_area + + +if __name__ == "__main__": + import doctest + + doctest.testmod() From 4fbd350b6e08aeb22741d694ce2e64182c66ac92 Mon Sep 17 00:00:00 2001 From: PAUL ADUTWUM Date: Sat, 8 Mar 2025 16:47:04 -0500 Subject: [PATCH 2/3] Improved test coverage in decimal_to_fraction.py (#12608) * Imporved test coverage in decimal_to_fraction.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update decimal_to_fraction.py * Update decimal_to_fraction.py --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Maxim Smolskiy --- maths/decimal_to_fraction.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/maths/decimal_to_fraction.py b/maths/decimal_to_fraction.py index 2aa8e3c3dfd6..7f1299b33c5c 100644 --- a/maths/decimal_to_fraction.py +++ b/maths/decimal_to_fraction.py @@ -16,6 +16,20 @@ def decimal_to_fraction(decimal: float | str) -> tuple[int, int]: >>> decimal_to_fraction("78td") Traceback (most recent call last): ValueError: Please enter a valid number + >>> decimal_to_fraction(0) + (0, 1) + >>> decimal_to_fraction(-2.5) + (-5, 2) + >>> decimal_to_fraction(0.125) + (1, 8) + >>> decimal_to_fraction(1000000.25) + (4000001, 4) + >>> decimal_to_fraction(1.3333) + (13333, 10000) + >>> decimal_to_fraction("1.23e2") + (123, 1) + >>> decimal_to_fraction("0.500") + (1, 2) """ try: decimal = float(decimal) From e3fb5309da98e2d07699ae39eb0a55836a063532 Mon Sep 17 00:00:00 2001 From: PAUL ADUTWUM Date: Sat, 8 Mar 2025 16:52:20 -0500 Subject: [PATCH 3/3] Improve decimal_to_fraction.py (#12611) * Update decimal_to_fraction.py * Update decimal_to_fraction.py --------- Co-authored-by: Maxim Smolskiy --- maths/decimal_to_fraction.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/maths/decimal_to_fraction.py b/maths/decimal_to_fraction.py index 7f1299b33c5c..be42b9fb3b5a 100644 --- a/maths/decimal_to_fraction.py +++ b/maths/decimal_to_fraction.py @@ -48,8 +48,8 @@ def decimal_to_fraction(decimal: float | str) -> tuple[int, int]: if remainder == 0: break dividend, divisor = divisor, remainder - numerator, denominator = numerator / divisor, denominator / divisor - return int(numerator), int(denominator) + numerator, denominator = numerator // divisor, denominator // divisor + return numerator, denominator if __name__ == "__main__":