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Commit c233167

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added: add two numbers
1 parent 39af035 commit c233167

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# add two numbers | leetcode 02 | https://leetcode.com/problems/add-two-numbers/
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# 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 addTwoNumbers(self, l1: list[ListNode], l2: list[ListNode]) -> list[ListNode]:
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res = ListNode()
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head = res
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while l1 != None or l2 != None:
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if l1 == None:
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this_val = res.val + l2.val
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l2 = l2.next
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elif l2 == None:
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this_val = res.val + l1.val
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l1 = l1.next
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else:
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this_val = res.val + l1.val + l2.val
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l1, l2 = l1.next, l2.next
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this_digit = this_val % 10
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next_digit = this_val // 10
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res.val = this_digit
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if l1 != None or l2 != None:
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res.next = ListNode(next_digit)
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res = res.next
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if next_digit > 0:
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res.next = ListNode(next_digit)
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res = res.next
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return head
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