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Update ps0.py #6

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Update ps0.py #6

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20 changes: 19 additions & 1 deletion fall2024/psets/ps0/ps0.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,15 @@ def __init__(self, key):
# Runtime: O(n)
def calculate_sizes(v):
# Your code goes here
if v.left == None and v.right == None:
v.size = 1
elif v.left == None:
v.size = 1 + calculate_sizes(v.right)
elif v.right == None:
v.size = 1 + calculate_sizes(v.left)
else:
v.size = 1 + calculate_sizes(v.left) + calculate_sizes(v.right)
return v.size
pass


Expand All @@ -53,4 +62,13 @@ def calculate_sizes(v):

def FindDescendantOfSize(t, v):
# Your code goes here
pass
if v.size >= t and v.size <= (2*t):
return v
if v.right == None:
return FindDescendantOfSize(t, v.left)
if v.left == None:
return FindDescendantOfSize(t, v.right)
if v.left.size > v.right.size:
return FindDescendantOfSize(t,v.left)
return FindDescendantOfSize(t,v.right)
pass