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2008-08-13 14:47

由于原域名wandsea.com.cn被各大搜索网站封锁（baidu，live），而且即将于11月过期，所以，从即日起，我的Blog域名更改为 Wandsea.com，给大家造成不便，请谅解，如有友情链接，请花几分钟的时间更改一下，如有Rss订阅，也请更改一下，谢谢。原域名仍可使用，直至其过期。

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Section 1.4 Mother's Milk

2008-03-22 16:52

[题目]

Farmer John has three milking buckets of capacity A, B, and C liters. Each of the numbers A, B, and C is an integer from 1 through 20, inclusive. Initially, buckets A and B are empty while bucket C is full of milk. Sometimes, FJ pours milk from one bucket to another until the second bucket is filled or the first bucket is empty. Once begun, a pour must be completed, of course. Being thrifty, no milk may be

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Section 1.4 Arithmetic Progressions

2008-03-22 16:29

[题目]

An arithmetic progression is a sequence of the form a, a+b, a+2b, ..., a+nb where n=0,1,2,3,... . For this problem, a is a non-negative integer and b is a positive integer.

Write a program that finds all arithmetic progressions of length n in the set S of bisquares. The set of bisquares is defined as the set of all integers of the form p² + q

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Section 1.4 The Clocks 钟

2008-02-28 18:11

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[题目]

IOI'94 - Day 2

Consider nine clocks arranged in a 3x3 array thusly:

|-------|    |-------|    |-------|    
|       |    |       |    |   |   |    
|---O   |    |---O   |    |   O   |          
|       |    |       |    |       |

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Section 1.4 Packing Rectangles 铺放矩形块

2008-02-07 14:43

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[题目]
IOI 95

The six basic layouts of four rectangles

Four rectangles are given. Find the smallest enclosing (new) rectangle into which these four may be fitted without overlapping. By smallest rectangle, we mean the one with the smallest area.

All four rectangles should have their sides

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