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19 lines
528 B
Python
19 lines
528 B
Python
# Definition for singly-linked list.
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# class ListNode:
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# def __init__(self, val=0, next=None):
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# self.val = val
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# self.next = next
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class Solution:
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def deleteDuplicates(self, head: Optional[ListNode]) -> Optional[ListNode]:
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current = head
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while current != None:
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next = current.next
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while next != None and current.val == next.val:
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next = next.next
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current.next = next
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current = next
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return head |