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50 lines
751 B

package solutions
func pushBack(node *NodeAddL, num int) *NodeAddL {
nw := &NodeAddL{Num: num}
if node == nil {
return nw
}
for tmp := node; tmp != nil; tmp = tmp.Next {
if tmp.Next == nil {
tmp.Next = nw
return node
}
}
return node
}
func Changeorder(node *NodeAddL) *NodeAddL {
if node == nil {
return node
}
ans := &NodeAddL{Num: node.Num}
for tmp := node; tmp != nil; {
tmp = tmp.Next
if tmp == nil {
break
}
tmp = tmp.Next
if tmp == nil {
break
}
ans = pushBack(ans, tmp.Num)
}
if node.Next == nil {
return ans
}
for tmp := node.Next; tmp != nil; {
ans = pushBack(ans, tmp.Num)
tmp = tmp.Next
if tmp == nil {
break
}
tmp = tmp.Next
if tmp == nil {
break
}
}
return ans
}