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#Leet Code# Root to leaf
语言:Python描述:使用递归实现 1 def getList(self, node): 2 if node is None: 3 return [] 4 5 if node.left is None and node.right ...
分类:其他好文   时间:2014-07-16 21:37:16    阅读次数:174
决策树分类
决策树(DecisionTree)又称为判定树,是运用于分类的一种树结构。当中的每一个内部结点(internalnode)代表对某个属性的一次測试,每条边代表一个測试结果,叶结点(leaf)代表某个类(class)或者类的分布(classdistribution),最上面的结点是根结点。决策树分为分...
分类:其他好文   时间:2014-07-16 19:47:06    阅读次数:178
Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example: Given the below binary tree and sum ...
分类:其他好文   时间:2014-07-13 13:58:01    阅读次数:184
【LeetCode】Path Sum
题目 Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example: Given the below binary tree ...
分类:其他好文   时间:2014-07-09 10:32:42    阅读次数:151
【LeetCode】Sum Root to Leaf Numbers
题目 Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the root-to-leaf path 1->2->3 which represents the number 123. Find ...
分类:其他好文   时间:2014-07-08 21:43:08    阅读次数:219
[Leetcode][Tree][Path Sum]
很简单的一道题,判断和为sum的路径是否存在。结果WA了两次,一次是由于没有考虑清楚深搜停止的条件,另外一次是由于没有考虑到Path必须是从root到leaf的。 1 /** 2 * Definition for binary tree 3 * struct TreeNode { 4 * ...
分类:其他好文   时间:2014-07-05 22:39:11    阅读次数:253
[Leetcode][Tree][Sum Root to Leaf Numbers]
非常简单的一个题,和path sum非常类似。 1 /** 2 * Definition for binary tree 3 * struct TreeNode { 4 * int val; 5 * TreeNode *left; 6 * TreeNode *rig...
分类:其他好文   时间:2014-07-05 22:03:48    阅读次数:251
[leetcode] Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
分类:其他好文   时间:2014-07-03 13:02:23    阅读次数:200
Leetcode Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo...
分类:其他好文   时间:2014-07-02 22:34:44    阅读次数:318
Leetcode Path Sum II
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.For example:Given the below binary tree andsum =...
分类:其他好文   时间:2014-07-02 22:10:42    阅读次数:262
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