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C17 Heather Moore: passed all tests #83

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C17 Heather Moore: passed all tests #83

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16 changes: 15 additions & 1 deletion linked_lists/intersection.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,4 +11,18 @@ 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
try:
if headB.next:
headB_first = headB
while headA.next:
while headB.next:
if headA == headB:
return headA
else:
headB = headB.next
else:
headA = headA.next
headB = headB_first
except:
return None