USACO 2.3 Zero Sum 零的算式和 解题报告
Zero Sum
Consider the sequence of digits from 1 through N (where N=9) in increasing order: 1 2 3 … N.
Now insert either a ‘+’ for addition or a ‘-‘[……]
OI路程
USACO 2.3 Cow Pedigrees 奶牛家谱 解题报告
Farmer John is considering purchasing a new herd of cows. In this new herd, each mother cow gives birth to two children. The relationships among the c[……]
USACO 2.3 Money Systems 货币系统 解题报告
Money Systems
The cows have not only created their own government but they have chosen to create their own money system. In their own rebellious way,[……]
USACO 1.1 Broken Necklace 破碎的项链 解题报告
Broken Necklace
You have a necklace of N red, white, or blue beads (3<=N<=350) some of which are red, others blue, and others white, arranged at[……]
USACO 2.3 Controlling Companies 控制公司 解题报告
Controlling Companies
Some companies are partial owners of other companies because they have acquired part of their total shares of stock. For examp[......]USACO 2.4 The Tamworth Two 两只塔姆沃斯牛 解题报告
The Tamworth Two
BIO \'98 - Richard Forster
A pair of cows is loose somewhere in the forest. Farmer John is lending his expertise to their capt[......]USACO 2.4 Cow Tours 牛的旅行 解题报告
Cow Tours
Farmer John has a number of pastures on his farm. Cow paths connect some pastures with certain other pastures, forming a field. But, at the[......]USACO 2.4 Overfencing 穿越栅栏 解题报告
USACO 2.4 Overfencing 穿越栅栏
Overfencing
Kolstad and Schrijvers
Farmer John went crazy and created a huge maze of fences out in a field. Happily, he[......]USACO 2.2 Subset Sums集合 解题报告
USACO 2.2 Subset Sums集合
For many sets of consecutive integers from 1 through N (1 <= N <= 39), one can partition the set into two sets whose sum[……]
Packing Rectangles 铺放矩形块 (IOI 95)
Packing Rectangles 铺放矩形块 (IOI 95)
在网上看了挺多解释这一题的文章，总感觉没看大懂，所以自己写一篇文章吧。希望能够帮助大家理解一下这一题。题目如下：
http://www.nocow.cn/index.php/Translate:USACO/packrec
开始拿到题[……]