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POJ 3370 Halloween treats(抽屉原理)
Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets on that day, no matter how many children call on him, so it ma...
分类:其他好文   时间:2014-08-19 22:28:45    阅读次数:278
zoj 3209 Treasure Map(精确覆盖)
Treasure MapTime Limit:2 Seconds Memory Limit:32768 KBYour boss once had got many copies of a treasure map. Unfortunately, all the copies are now brok...
分类:其他好文   时间:2014-08-19 18:26:35    阅读次数:284
How many ways(dfs+记忆化搜索)
Problem Description 这是一个简单的生存游戏,你控制一个机器人从一个棋盘的起始点(1,1)走到棋盘的终点(n,m)。游戏的规则描述如下: 1.机器人一开始在棋盘的起始点并有起始点所标有的能量。 2.机器人只能向右或者向下走,并且每走一步消耗一单位能量。 3.机器人不能在原地停留。 4.当机器人选择了一条可行路径后,当他走到这条路径的终点时,他将只有终点所标记的能量。 [ce...
分类:其他好文   时间:2014-08-19 16:35:04    阅读次数:219
KVC/KVO原理详解及编程指南
一、简介1、KVC简介2、KVO简介二、KVC相关技术1、Key和Key Path2、点语法和KVC3、一对多关系(To-Many)中的集合访问器方法4、键值验证(Key-Value Validation)5、KVC对数值和结构体型属性的支持6、集合运算符(Collection Operators)...
分类:其他好文   时间:2014-08-19 14:13:04    阅读次数:342
The laser engraving machine requires little knowledge
In many manufacturing industries it is a need to print or mark the brand name, seal or other particulars on a product, so it uses the marking techniqu...
分类:其他好文   时间:2014-08-19 10:35:03    阅读次数:255
异常处理
异常处理 一、预定义异常: Dup_val_on_index:试图向唯一索引列插入重复值,相当于建立了一个唯一索引 然后再向这个索引的列中插入一条重复的数据就会异常。 Invalid_cursors:试图进行非法的游标操作 Invalid_number : 试图将字符串转换为数字 no_data_found : select into 语句没有返回任何记录 Too_many_rows ...
分类:其他好文   时间:2014-08-19 09:27:03    阅读次数:210
POJ2785:4 Values whose Sum is 0(二分)
Description The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how many quadruplet (a, b, c, d ) ∈ A x B x C x D are such that a + b + c + d = 0 . ...
分类:其他好文   时间:2014-08-18 18:43:52    阅读次数:210
HDU-4947-GCD Array(树状数组+莫比乌斯反演)
Problem Description Teacher Mai finds that many problems about arithmetic function can be reduced to the following problem: Maintain an array a with index from 1 to l. There are two kinds of ope...
分类:其他好文   时间:2014-08-18 16:26:42    阅读次数:248
The User Can Fill The Air In The Punching Kids Bag By Using The Foot Pump
Exploring how many bags offer of designer names such as Prada and Gucci have. Actually, I wonder how they get affordable designer handbags and wallets...
分类:其他好文   时间:2014-08-18 12:21:34    阅读次数:405
UVA 116 Unidirectional TSP(DP)
Background Problems that require minimum paths through some domain appear in many different areas of computer science. For example, one of the constraints in VLSI routing problems is minimizing wire ...
分类:其他好文   时间:2014-08-18 00:20:23    阅读次数:331
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