Final answer:
In Python, you can use a linked list data structure to add two numbers represented by linked lists. Iterate through both linked lists simultaneously, adding the corresponding digits and keeping track of the carry. Make sure to handle cases where one list is longer than the other.
Step-by-step explanation:
In Python, you can use a linked list data structure to solve the problem of adding two numbers represented by two linked lists. To solve this problem, you can iterate through both linked lists simultaneously, starting from the head of each list. At each iteration, you add the corresponding digits from the linked lists and keep track of the carry. If the sum is greater than 9, you update the carry and add the remainder to the new linked list. If one of the linked lists ends before the other, you can treat the remaining digits as 0s.
Here is an example:
class ListNode:def __init__(self, val=0, next=None): self.val = val self.next = nextdef addTwoNumbers(l1, l2): dummy = ListNode(0) curr = dummy carry = 0 while l1 or l2 or carry: if l1: carry += l1.val l1 = l1.next if l2: carry += l2.val l2 = l2.next curr.next = ListNode(carry % 10) carry = carry // 10 curr = curr.next return dummy.next