Algorithm to get maximum path sum of a binary tree. #9414
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added
require tests
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| left, right -> Stores the pointer to left or right node. | ||
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| def __init__(self, val: int, left=None, right=None) -> None: |
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Please provide type hint for the parameter: left
Please provide type hint for the parameter: right
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| def __init__(self, root): |
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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: root
| return self.sum | ||
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| def construct_tree() -> TreeNode: |
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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/binary_tree/binary_tree_maximum_path_sum.py, please provide doctest for the function construct_tree
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| left, right -> Stores the pointer to left or right node. | ||
| """ | ||
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| def __init__(self, val: int, left=None, right=None) -> None: |
There was a problem hiding this comment.
Please provide type hint for the parameter: left
Please provide type hint for the parameter: right
| 29 | ||
| """ | ||
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| def __init__(self, root): |
There was a problem hiding this comment.
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: root
| return self.sum | ||
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| def construct_tree() -> TreeNode: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/binary_tree/binary_tree_maximum_path_sum.py, please provide doctest for the function construct_tree
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# Conflicts: # data_structures/binary_tree/binary_tree_maximum_path_sum.py
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require tests
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| """ | ||
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| def __init__(self, root) -> None: |
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Please provide type hint for the parameter: root
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@cclauss Hello, sorry to interrupt ! , but can you please take a look into it. |
| self.right: TreeNode | None = None | ||
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| class GetMaxPathSum: |
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This is a custom class only designed the get the sum.
I would prefer to see a generic BinaryTree class that:
- has a
self.root_node - implements
.__iter__()instead of.traverse(). - delivers the solution with the simple line
sum(binary_tree)
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Like this but for a BinaryTree instead of a LinkedList.
https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/reverse_k_group.py#L13
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Perhaps 3. is not possible for this problem.
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@cclauss I'm bit confused about iter(), as traverse recursively takes maximum from left and right subtree, how can I implement that. Please give me hint on it.
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Yes. Now I see the difficulties. Please make the BinaryTree and make a .traverse() method that yields the values.
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@cclauss As the algorithm traverses all the nodes recursively, if we try to yield values of nodes, we'll end up yielding all the nodes. Because yield will go over all nodes where's our algorithm only requires those nodes that makes up the maximum value. Please correct me if i'm wrong.
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@cclauss Hello, My PR getting out of the list now. Can you hear me back please how can I improve more.
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algorithms-keeper
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removed
require type hints
Describe your change:
Added a new algorithm to get maximum path sum of a binary tree.
It solves one of the Hard questions from Leetcode.
Checklist: