LeetCode 剑指 Offer 06. 从尾到头打印链表

题目描述

✅ 剑指 Offer 06. 从尾到头打印链表

image-20241107204146295

思路分析

思路描述

参考代码



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func reversePrint(head *ListNode) []int {
	stack := []int{}

	for head != nil {
		stack = append(stack, head.Val)
		head = head.Next
	}

	var res []int

	for len(stack) > 0 {
		res = append(res, stack[len(stack)-1])
		stack = stack[:len(stack)-1]
	}

	return res
}





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func reverseBookList(head *ListNode) []int {
	head = reverse(head)
	var res []int
	cur := head
	for cur != nil {
		res = append(res, cur.Val)
		cur = cur.Next
	}
	return res
}

func reverse(head *ListNode) *ListNode {
	if head == nil || head.Next == nil {
		return head
	}
	var pre *ListNode
	cur := head
	for cur != nil {
		next := cur.Next
		cur.Next = pre
		pre = cur
		cur = next
	}
	return pre
}





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func reverseBookList(head *ListNode) []int {
	var res []int
	var dfs func(node *ListNode)

	dfs = func(node *ListNode) {
		if node == nil {
			return
		}
		dfs(node.Next)
		res = append(res, node.Val)
	}

	dfs(head)
	return res
}

➡️ 点击查看 Java 题解



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