The gray code is a binary numeral system where two successive values differ in only one bit.
Given a non-negative integer n representing the total number of bits in the code, print the sequence of gr...
分类：
其他好文 时间：
2014-05-07 06:10:17
阅读次数：
370
[Question]
Given an array of integers, find two numbers such that they add up to a specific target number.
The function twoSum should return indices of the two numbers such that they add up to t...
分类：
其他好文 时间：
2014-05-07 05:37:44
阅读次数：
278
题目
Given a binary tree, return the preorder traversal of its nodes' values.
For example:
Given binary tree {1,#,2,3},
1
2
/
3
return [1,2,3].
Note: Recursiv...
分类：
其他好文 时间：
2014-05-07 03:30:19
阅读次数：
254
一直在写c++程序，不过对于一些作图程序来说，还是MATLAB比较实在。
de Casteljau算法是作贝塞尔曲线的一种高效的算法，其思想就是对[0,1]区间中所有的t，通过n个控制顶点不断递推得到一个顶点：下面是我的代码实现:
function deCasteljau(P,Q)
%P is 1*n matrix for X
%Q is 1*n matrix for...
分类：
其他好文 时间：
2014-05-07 03:14:37
阅读次数：
303
题目：
A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.
Return a deep copy of the list.
思路：
主要是深层复制的问题：
本题比较简...
分类：
其他好文 时间：
2014-05-07 02:44:38
阅读次数：
344
You are given an N × N grid initially filled by zeros. Let the rows and columns of the grid be numbered from1 to N, inclusive. There are two types of operations can be applied to the grid:
RowAdd R...
分类：
其他好文 时间：
2014-05-06 22:35:44
阅读次数：
451
题目原文：
Given n, how many structurally unique BST's (binary search trees) that store values 1...n?
For example,Given n = 3, there are a total of 5 unique BST's.
题目理解...
分类：
其他好文 时间：
2014-05-06 22:15:57
阅读次数：
415
For a given positive integer n, please find the smallest positive integer x that we can find an integer y such that y^2 = n +x^2.
Input
The first line is an integer T, which is the the...
分类：
其他好文 时间：
2014-05-06 19:21:10
阅读次数：
290
Suppose a sorted array is rotated at some pivot unknown to you beforehand.
(i.e., 0 1 2 4 5 6 7 might become 4
5 6 7 0 1 2).
You are given a target value to search. If found in the array retur...
分类：
其他好文 时间：
2014-05-06 19:03:11
阅读次数：
365
五一中间断了几天，开始继续。。。
1、
??
Copy List with Random Pointer
A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.
Return a...
分类：
其他好文 时间：
2014-05-06 18:54:59
阅读次数：
386
