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C17 Sea Turtles - Shannon Bellemore #101

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C17 Sea Turtles - Shannon Bellemore #101

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13 changes: 9 additions & 4 deletions linked_lists/intersection.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,3 @@



class Node:
def __init__(self, value):
self.val = value
Expand All @@ -11,4 +8,12 @@ def intersection_node(headA, headB):
""" Will return the node at which the two lists intersect.
If the two linked lists have no intersection at all, return None.
"""
pass
if not headA or not headB:
return None

nodeA = headA
nodeB = headB
while nodeA is not nodeB:
nodeA = headB if nodeA is None else nodeA.next
nodeB = headA if nodeB is None else nodeB.next
return nodeA