22 lines
651 B
Python
22 lines
651 B
Python
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 addTwoNumbers(self, l1: ListNode | None, l2: ListNode | None) -> ListNode | None:
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dummy = ListNode()
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curr = dummy
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carry = 0
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while l1 or l2 or carry:
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v1 = l1.val if l1 else 0
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v2 = l2.val if l2 else 0
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digit = (v1 + v2 + carry) % 10
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carry = (v1 + v2 + carry) // 10
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curr.next = ListNode(digit)
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curr = curr.next
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l1 = l1.next if l1 else None
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l2 = l2.next if l2 else None
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return dummy.next
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