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package main
import "fmt"
type ListNode struct {
Val int
Next *ListNode
}
func dumpList(head *ListNode) {
for head.Next != nil {
fmt.Println(head.Val)
head = head.Next
}
fmt.Println(head.Val)
fmt.Println()
}
func oddEvenList(head *ListNode) *ListNode {
if head == nil {
return nil
}
odd, even := head, head.Next
evenHead := even
for even != nil && even.Next != nil {
odd.Next = even.Next
odd = odd.Next
even.Next = odd.Next
even = even.Next
}
odd.Next = evenHead
return head
}
func main() {
node1 := &ListNode{1, nil}
node2 := &ListNode{2, nil}
node3 := &ListNode{3, nil}
node4 := &ListNode{4, nil}
node5 := &ListNode{5, nil}
node1.Next = node2
node2.Next = node3
node3.Next = node4
node4.Next = node5
head := node1
head = oddEvenList(node1)
for head.Next != nil {
fmt.Println(head.Val)
head = head.Next
}
fmt.Println(head.Val)
}
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