LeetCode 2. 两数相加

题目描述

🔥 2. 两数相加

image-20220904112618179

image-20220904112624859

思路分析

加法问题

参考代码

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func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode {
	if l1 == nil {
		return l2
	} else if l2 == nil {
		return l1
	}
	dummy := &ListNode{}
	cur := dummy
	carry := 0
	for l1 != nil || l2 != nil || carry > 0 {
		total := carry
		if l1 != nil {
			total += l1.Val
			l1 = l1.Next
		}
		if l2 != nil {
			total += l2.Val
			l2 = l2.Next
		}
		cur.Next = &ListNode{Val: total % 10}
		cur = cur.Next
		carry = total / 10
	}
	return dummy.Next
}

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