[LeetCode][python3]0002. Add Two Numbers

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N2I -2020.03.15

1. My first solution

class Solution:
    def addTwoNumbers(self, l1: ListNode, l2: ListNode) -> ListNode:
        h=p=ListNode()
        c=0
        while True:
            if c==0 and l1==None and l2==None:
                break
            a=b=0
            if l1:
                a=l1.val
                l1=l1.next
            if l2:
                b=l2.val
                l2=l2.next
            n=a+b+c
            if n>=10:
                n-=10
                p.next=ListNode(n)
                c=1
            else:
                p.next=ListNode(n)
                c=0
            p=p.next
        return h.next

N2I -2020.03.15

2. Other solution

(Most of them are in the same logic)