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43 lines
594 B
43 lines
594 B
package deletemiddle
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type ListNode struct {
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Val int
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Next *ListNode
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}
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func length(node *ListNode) int {
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length := 0
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for node != nil {
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length++
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node = node.Next
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}
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return length
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}
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func nth(node *ListNode, n int) *ListNode {
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for i := 0; i < n; i++ {
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node = node.Next
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}
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return node
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}
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func deleteMiddle(head *ListNode) *ListNode {
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length := length(head)
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if length <= 1 {
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return nil
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}
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midIndex := length / 2
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preceeding := nth(head, midIndex-1)
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preceeding.Next = preceeding.Next.Next
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return head
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}
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func Delete(head *ListNode) *ListNode {
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return deleteMiddle(head)
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}
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