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Copy pathSolution.py
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37 lines (30 loc) · 938 Bytes
/
Copy pathSolution.py
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37 lines (30 loc) · 938 Bytes
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# Definition for a Node.
class Node:
def __init__(self, x: int, next: 'Node' = None, random: 'Node' = None):
self.val = int(x)
self.next = next
self.random = random
class Solution:
def copyRandomList(self, head: 'Node') -> 'Node':
if head is None:
return None
cur = head
while cur is not None:
node = Node(cur.val)
node.next = cur.next
cur.next = node
cur = node.next
cur = head
while cur is not None:
if cur.random is not None:
cur.next.random = cur.random.next
cur = cur.next.next
dummy = Node(-1)
newListNode = dummy
cur = head
while cur is not None:
newListNode.next = cur.next
newListNode = newListNode.next
cur.next = cur.next.next
cur = cur.next
return dummy.next