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Merged
merged 1 commit into from
Aug 23, 2020
Merged

精简代码 #53

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35 changes: 13 additions & 22 deletions leetcode/0002.Add-Two-Numbers/2. Add Two Numbers.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,36 +16,27 @@ type ListNode = structures.ListNode
*/

func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode {
if l1 == nil || l2 == nil {
return nil
}
head := &ListNode{Val: 0, Next: nil}
head := &ListNode{Val: 0}
current := head
carry := 0
for l1 != nil || l2 != nil {
var x, y int

var n1, n2, carry int
for l1 != nil || l2 != nil || carry != 0 {
if l1 == nil {
x = 0
n1 = 0
} else {
x = l1.Val
n1 = l1.Val
l1 = l1.Next
}
if l2 == nil {
y = 0
n2 = 0
} else {
y = l2.Val
}
current.Next = &ListNode{Val: (x + y + carry) % 10, Next: nil}
current = current.Next
carry = (x + y + carry) / 10
if l1 != nil {
l1 = l1.Next
}
if l2 != nil {
n2 = l2.Val
l2 = l2.Next
}
current.Next = &ListNode{Val: (n1 + n2 + carry) % 10}
current = current.Next
carry = (n1 + n2 + carry) / 10
}
if carry > 0 {
current.Next = &ListNode{Val: carry % 10, Next: nil}
}

return head.Next
}