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[pre-commit.ci] auto fixes from pre-commit.com hooks

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pre-commit-ci[bot] 2024-10-19 11:27:42 +00:00
parent 210e9a2d6e
commit fc627f1e5f
1 changed files with 11 additions and 4 deletions
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15
data_structures/persistent_segment_tree.py
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@ -1,11 +1,13 @@
from __future__ import annotations
class Node:
def __init__(self, value: int = 0) -> None:
self.value: int = value
self.left: Node | None = None
self.right: Node | None = None
class PersistentSegmentTree:
def __init__(self, arr: list[int]) -> None:
self.n: int = len(arr)
@ -81,7 +83,9 @@ class PersistentSegmentTree:
new_node.left = node.left # Ensure left node is the same as the original
new_node.right = self._update(node.right, mid + 1, end, index, value)
new_node.value = new_node.left.value + (new_node.right.value if new_node.right else 0)
new_node.value = new_node.left.value + (
new_node.right.value if new_node.right else 0
)
return new_node
@ -97,7 +101,7 @@ class PersistentSegmentTree:
>>> version_1 = pst.update(0, 1, 5) # Update index 1 to 5
>>> pst.query(version_1, 0, 3) # Sum of all elements in new version
13
>>> pst.query(version_1, 1, 2) # Sum of elements at index 1 and 2
>>> pst.query(version_1, 1, 2) # Sum of elements at index 1 and 2
8
"""
return self._query(self.roots[version], 0, self.n - 1, left, right)
@ -120,12 +124,15 @@ class PersistentSegmentTree:
if left <= start and right >= end:
return node.value
mid = (start + end) // 2
return (self._query(node.left, start, mid, left, right) +
self._query(node.right, mid + 1, end, left, right))
return self._query(node.left, start, mid, left, right) + self._query(
node.right, mid + 1, end, left, right
)
# Running the doctests
if __name__ == "__main__":
import doctest
print("Running doctests...")
result = doctest.testmod()
print(f"Ran {result.attempted} tests, {result.failed} failed.")