Golang | Leetcode Golang题解之第147题对链表进行插入排序

题目：

题解：

func insertionSortList(head *ListNode) *ListNode {
    if head == nil {
        return nil
    }
    dummyHead := &ListNode{Next: head}
    lastSorted, curr := head, head.Next
    for curr != nil {
        if lastSorted.Val <= curr.Val {
            lastSorted = lastSorted.Next
        } else {
            prev := dummyHead
            for prev.Next.Val <= curr.Val {
                prev = prev.Next
            }
            lastSorted.Next = curr.Next
            curr.Next = prev.Next
            prev.Next = curr
        }
        curr = lastSorted.Next
    }
    return dummyHead.Next
}