2. Add Two Numbers

🟧 Medium

Solution

My Solution

/**
 * Definition for singly-linked list.
 * type ListNode struct {
 *     Val int
 *     Next *ListNode
 * }
 */
func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode {
    head := &ListNode{}
    curr := head
    carry := 0

    for l1 != nil || l2 != nil || carry != 0{
        num := carry
        if l1 != nil {
            num += l1.Val
            l1 = l1.Next
        }
        if l2 != nil {
            num += l2.Val
            l2 = l2.Next
        }

        curr.Next = &ListNode{Val:num%10}
        curr = curr.Next
        
        carry = num/10
    }

    return head.Next
}

result

Leetcode: link