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/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public: ListNode *g...
分类:编程语言   时间:2015-02-02 21:38:39    阅读次数:203
spark MLlib 概念 3: 卡方分布
数学定义[编辑]若k个随机变量、……、是相互独立,符合标准正态分布的随机变量(数学期望为0、方差为1),则随机变量Z的平方和被称为服从自由度为k的卡方分布,记作Definition[edit]IfZ1, ...,Zkareindependent,standard normalrandom varia...
分类:其他好文   时间:2015-02-01 17:32:23    阅读次数:209
Summary: Prime
最近遇到很多问题都跟Prime有关,于是总结一下:Prime definition:Aprime number(or aprime) is anatural numbergreater than 1 that has no positivedivisorsother than 1 and itsel...
分类:其他好文   时间:2015-02-01 07:07:26    阅读次数:217
Merge Two Sorted Lists
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. #include #include using namespace std; //Definition fo...
分类:其他好文   时间:2015-01-31 16:22:38    阅读次数:152
Convert Sorted List to Binary Search Tree
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 解题思路:采用中序排列的方法递归地决定每个结点的数值; #include #include #include using namespace std; //Definition...
分类:其他好文   时间:2015-01-30 16:00:24    阅读次数:131
Linked List Cycle
Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?/** * Definition for singly-linked list. *...
分类:其他好文   时间:2015-01-29 12:07:35    阅读次数:117
Binary Tree Maximum Path Sum
Given a binary tree, find the maximum path sum. The path may start and end at any node in the tree. 求树的一点到另一点的最大路径,利用递归的方法,ans 在 左子树,右子树,root+左+右的最大中产生。 /** * Definition for binary tree * struct ...
分类:其他好文   时间:2015-01-27 22:01:36    阅读次数:112
Balanced Binary Tree
检测一个树是否平衡,不需要求出高度,而是从底到顶检测是否平衡,这样才算法时间复杂度为O(n)。但是需要额外的O(logn)的空间 /** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(...
分类:其他好文   时间:2015-01-27 21:55:39    阅读次数:164
[Leetcode] 21 - Merge Two Sorted Lists
原题链接:https://oj.leetcode.com/problems/merge-two-sorted-lists/ 这道题用指针的指针实现,做法会非常简单干净。直接上代码 /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; *...
分类:其他好文   时间:2015-01-27 14:56:08    阅读次数:109
Head File
Notes from C++PrimerIn general, head file includes: class definition, declaration of extern variable and declaration of function.1. Head file is used ...
分类:其他好文   时间:2015-01-27 13:01:17    阅读次数:117
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