package main

import "fmt"

type ListNode struct {
	Val  int
	Next *ListNode
}

func makeLink(arr []int) *ListNode {
	if len(arr) == 0 {
		return nil
	}
	head := &ListNode{}
	cur := head
	for _, v := range arr {
		cur.Next = &ListNode{Val: v}
		cur = cur.Next
	}
	return head.Next
}
func checkLink(head *ListNode) {
	for head != nil {
		fmt.Println(head.Val)
		head = head.Next
	}
}