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SelfBalancingTree updated #189

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Merged
merged 1 commit into from
Mar 22, 2020
Merged

SelfBalancingTree updated #189

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12 changes: 6 additions & 6 deletions pydatastructs/trees/binary_trees.py
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Original file line number Diff line number Diff line change
Expand Up @@ -566,6 +566,9 @@ def _right_rotate(self, j, k):
self.tree[self.tree[k].parent].left = k
self.tree[j].parent = k
self.tree[k].right = j
kp = self.tree[k].parent
if kp is None:
self.root_idx = k

def _left_right_rotate(self, j, k):
i = self.tree[k].right
Expand Down Expand Up @@ -617,6 +620,9 @@ def _left_rotate(self, j, k):
self.tree[self.tree[k].parent].right = k
self.tree[j].parent = k
self.tree[k].left = j
kp = self.tree[k].parent
if kp is None:
self.root_idx = k

class AVLTree(SelfBalancingBinaryTree):
"""
Expand Down Expand Up @@ -645,9 +651,6 @@ def _right_rotate(self, j, k):
super(AVLTree, self)._right_rotate(j, k)
self.tree[j].height = max(self.left_height(self.tree[j]),
self.right_height(self.tree[j])) + 1
kp = self.tree[k].parent
if kp is None:
self.root_idx = k
if self.is_order_statistic:
self.tree[j].size = (self.left_size(self.tree[j]) +
self.right_size(self.tree[j]) + 1)
Expand Down Expand Up @@ -682,9 +685,6 @@ def _left_rotate(self, j, k):
self.right_height(self.tree[j])) + 1
self.tree[k].height = max(self.left_height(self.tree[k]),
self.right_height(self.tree[k])) + 1
kp = self.tree[k].parent
if kp is None:
self.root_idx = k
if self.is_order_statistic:
self.tree[j].size = (self.left_size(self.tree[j]) +
self.right_size(self.tree[j]) + 1)
Expand Down