首页 \ 问答 \ 查找BST中所有键位于给定范围内的子树(Find all subtrees in a BST whose keys lie in a given range)

查找BST中所有键位于给定范围内的子树(Find all subtrees in a BST whose keys lie in a given range)

在最近的一次采访中,我给出了这个问题:给定一个BST,其节点包含一个Integer值,找到所有节点落在整数X(min)和Y(max)之间的子树,其中X <Y。 这些子树不能相互重叠。

我已经解决了这个问题的变化,例如 - 打印一个BST的键落在一个给定的范围内。 但无法弄清楚这一点,因为它涉及到查找主图/树的所有连接的子图,以满足非常特定的约束条件。 任何指针/帮助/伪代码表示赞赏。

添加注释 -

  1. 该问题将节点的数据结构定义为具有左指针,右指针和整数值。 没有办法标记节点。
  2. 被问到用Java解决这个问题。
  3. 当我说子树/子图时,我的意思是连接的一组节点,而不是不相交节点的列表。 对困惑感到抱歉。

I was given this question during a recent interview: Given a BST whose nodes contains an Integer as value, find all subtrees whose nodes fall between integers X (min) and Y (max), where X<Y. These subtrees cannot overlap each other.

I have solved variations of this problem, example - print keys of a BST that fall in a given range. But couldn't figure this one out, since it involves finding all connected sub-graphs of the main graph/tree that satisfy very specific constraints. Any pointers/help/pseudo code is appreciated.

Added notes -

  1. The problem defined the datastructure of node as having a left pointer, right pointer, and a integer value. There was no way to mark a node.
  2. Was asked to solve this in Java.
  3. When i said subtree/subgraph, i meant a connected set of nodes, not a list of disjoint nodes. sorry for the confusion.

原文:https://stackoverflow.com/questions/31096354
更新时间:2024-03-09 20:03

最满意答案

如果你想知道在这两个字典中有多少值匹配,你应该说:)

也许这样的事情:

shared_items = set(x.items()) & set(y.items())
print len(shared_items)

If you want to know how many values match in both the dictionaries, you should have said that :)

Maybe something like this:

shared_items = {k: x[k] for k in x if k in y and x[k] == y[k]}
print len(shared_items)

相关问答

更多

相关文章

更多

最新问答

更多
  • 您如何使用git diff文件,并将其应用于同一存储库的副本的本地分支?(How do you take a git diff file, and apply it to a local branch that is a copy of the same repository?)
  • 将长浮点值剪切为2个小数点并复制到字符数组(Cut Long Float Value to 2 decimal points and copy to Character Array)
  • OctoberCMS侧边栏不呈现(OctoberCMS Sidebar not rendering)
  • 页面加载后对象是否有资格进行垃圾回收?(Are objects eligible for garbage collection after the page loads?)
  • codeigniter中的语言不能按预期工作(language in codeigniter doesn' t work as expected)
  • 在计算机拍照在哪里进入
  • 使用cin.get()从c ++中的输入流中丢弃不需要的字符(Using cin.get() to discard unwanted characters from the input stream in c++)
  • No for循环将在for循环中运行。(No for loop will run inside for loop. Testing for primes)
  • 单页应用程序:页面重新加载(Single Page Application: page reload)
  • 在循环中选择具有相似模式的列名称(Selecting Column Name With Similar Pattern in a Loop)
  • System.StackOverflow错误(System.StackOverflow error)
  • KnockoutJS未在嵌套模板上应用beforeRemove和afterAdd(KnockoutJS not applying beforeRemove and afterAdd on nested templates)
  • 散列包括方法和/或嵌套属性(Hash include methods and/or nested attributes)
  • android - 如何避免使用Samsung RFS文件系统延迟/冻结?(android - how to avoid lag/freezes with Samsung RFS filesystem?)
  • TensorFlow:基于索引列表创建新张量(TensorFlow: Create a new tensor based on list of indices)
  • 企业安全培训的各项内容
  • 错误:RPC失败;(error: RPC failed; curl transfer closed with outstanding read data remaining)
  • C#类名中允许哪些字符?(What characters are allowed in C# class name?)
  • NumPy:将int64值存储在np.array中并使用dtype float64并将其转换回整数是否安全?(NumPy: Is it safe to store an int64 value in an np.array with dtype float64 and later convert it back to integer?)
  • 注销后如何隐藏导航portlet?(How to hide navigation portlet after logout?)
  • 将多个行和可变行移动到列(moving multiple and variable rows to columns)
  • 提交表单时忽略基础href,而不使用Javascript(ignore base href when submitting form, without using Javascript)
  • 对setOnInfoWindowClickListener的意图(Intent on setOnInfoWindowClickListener)
  • Angular $资源不会改变方法(Angular $resource doesn't change method)
  • 在Angular 5中不是一个函数(is not a function in Angular 5)
  • 如何配置Composite C1以将.m和桌面作为同一站点提供服务(How to configure Composite C1 to serve .m and desktop as the same site)
  • 不适用:悬停在悬停时:在元素之前[复制](Don't apply :hover when hovering on :before element [duplicate])
  • 常见的python rpc和cli接口(Common python rpc and cli interface)
  • Mysql DB单个字段匹配多个其他字段(Mysql DB single field matching to multiple other fields)
  • 产品页面上的Magento Up出售对齐问题(Magento Up sell alignment issue on the products page)