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Add Fibonacci Heap implementation #11863
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- Implemented `FibonacciHeap` with core operations: `insert`, `extract_min`, `decrease_key`, and `delete`. - Added `Node` class for heap node structure. - Optimized for amortized time complexity with O(1) inserts and O(log n) extract min. - Included example usage and basic documentation.
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class Node: | |||
def __init__(self, key): |
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Please provide return type hint for the function: __init__
. If the function does not return a value, please provide the type hint as: def function() -> None:
Please provide type hint for the parameter: key
self.prev = self # Pointer to the previous node in the circular list | ||
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class FibonacciHeap: | ||
def __init__(self): |
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Please provide return type hint for the function: __init__
. If the function does not return a value, please provide the type hint as: def function() -> None:
self.min_node = None # Pointer to the minimum node | ||
self.num_nodes = 0 # Number of nodes in the heap | ||
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def insert(self, key): |
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Please provide return type hint for the function: insert
. If the function does not return a value, please provide the type hint as: def function() -> None:
As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function insert
Please provide type hint for the parameter: key
self.min_node = new_node | ||
self.num_nodes += 1 | ||
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def _insert_to_root_list(self, node): |
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Please provide return type hint for the function: _insert_to_root_list
. If the function does not return a value, please provide the type hint as: def function() -> None:
As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function _insert_to_root_list
Please provide type hint for the parameter: node
self.min_node.prev.next = node | ||
self.min_node.prev = node | ||
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def extract_min(self): |
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Please provide return type hint for the function: extract_min
. If the function does not return a value, please provide the type hint as: def function() -> None:
As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function extract_min
for more information, see https://pre-commit.ci
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Repository:
Python:
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algorithms-keeper actions can be triggered by commenting on this PR:
@algorithms-keeper review
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return min_node.key | ||
return None | ||
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def _consolidate(self) -> None: |
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As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function _consolidate
if self.min_node is None or node.key < self.min_node.key: | ||
self.min_node = node | ||
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def _link(self, node1: Node, node2: Node) -> None: |
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As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function _link
if node.key < self.min_node.key: | ||
self.min_node = node | ||
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def _cut(self, node: Node, parent: Node) -> None: |
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As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function _cut
node.parent = None | ||
node.is_marked = False | ||
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def delete(self, node): |
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Please provide return type hint for the function: delete
. If the function does not return a value, please provide the type hint as: def function() -> None:
As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function delete
Please provide type hint for the parameter: node
self.decrease_key(node, float('-inf')) # Decrease the key to -infinity | ||
self.extract_min() # Extract the minimum node | ||
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def is_empty(self): |
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Please provide return type hint for the function: is_empty
. If the function does not return a value, please provide the type hint as: def function() -> None:
As there is no test file in this pull request nor any test function or class in the file data_structures/heap/fibonacci_heap.py
, please provide doctest for the function is_empty
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Here's a structured format for your pull request, incorporating your details along with placeholders for the checklist and description. You can copy and paste this directly into your PR:
Title
Implement Fibonacci Heap with Core Operations
Description
This pull request implements the
FibonacciHeap
data structure in Python, featuring core operations such asinsert
,extract_min
,decrease_key
, anddelete
. The implementation includes aNode
class to represent each heap node and optimizes for amortized time complexity, providing efficient operations crucial for algorithms like Dijkstra's.FibonacciHeap
with core operations:insert
,extract_min
,decrease_key
, anddelete
.Node
class for heap node structure.Describe your change:
Checklist:
Feel free to check or uncheck items in the checklist according to the current status of your pull request. If you have an issue number, you can also add it to the description section as "Fixes #". Let me know if you need any more adjustments!