Given two binary trees, write a function to check if they are equal or not.
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其他好文 时间:
2014-07-03 19:26:46
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213
Same Tree Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally i...
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其他好文 时间:
2014-07-02 17:56:50
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205
The gray code is a binary numeral system where two successive values differ in only one bit.
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其他好文 时间:
2014-07-02 14:47:43
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253
由于图像关于对角线对称,所以我们只看下三角区域。将x轴看做分母,被圈的点看成分子
依次是{1/2},{1/3,1/2},{1/4,3/4},{1/5,2/5,3/5,4/5}
写成前缀和的形式就是 {1/2},{1/2,1/3,2/3},{1/2,1/3,1/3,1/4,3/4},{1/2,1/3,1/3,1/4,3/4,1/5,2/5,3/5,4/5}
发现,这就是一个法雷级数,即第k项增...
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其他好文 时间:
2014-07-02 11:41:03
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137
Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively.
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其他好文 时间:
2014-07-02 10:03:09
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175
Accessors
存取方法
All instance variables are private in Objective-C by default, so you should use accessors to get and set values in most cases. There are two syntaxes. This is the traditional 1.x syntax:
OC中所有的实例变量默认是私有的,所以多数情况下你应该使用访问器来获得和设置实例变量的值。访问器有...
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其他好文 时间:
2014-07-02 08:39:04
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231
Rectangle and Circle
Problem Description
Given a rectangle and a circle in the coordinate system(two edges of the rectangle are parallel with the X-axis, and the other two are parallel with the Y...
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其他好文 时间:
2014-07-02 07:29:06
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268
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.
代码如下:
* Definition for singly-linked list.
* struct L...
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其他好文 时间:
2014-07-02 07:23:59
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159
UVA 12714 Two Points Revisited(简单数学题)...
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其他好文 时间:
2014-07-02 06:54:53
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154
【题目】
Given n points on a 2D plane, find the maximum number of points that lie on the same straight line.
【题意】
给定一堆点,要求找出一条之前上的最大点数
【思路】
没什么好的方法,从每个点P出发,遍历所有的情况
从每个点P出发,斜率相同的点即为统一之前上的点
注意两种特殊情况:
1. 两个点重合(即为同一个点)
...
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其他好文 时间:
2014-07-02 06:52:06
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171