技术

Controlling Companies 

Some companies are partial owners of other companies because they have acquired part of their total shares of stock. For examp[......]
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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[......]
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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[......]
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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[......]
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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[……]

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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[……]

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这题很简单，一位一位算就是，唯一要注意的就是mod 11 = 10的时候，要用X。代码：

C语言:

#include <stdio.h>
#include <ctype.h>
char isbn[14];

char getint(void)
{
 static int i[......]
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不知道这题该属于哪个类别，，贪心？枚举？反正不难，，代码：

C语言:

#include <stdio.h>

int main(void)
{
 int i;
 int a, b;
 int ans = 0, t = 0;
 for(i = 1; i <= 7; i++){
 sc[......]
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这题的话，怎么说呢？就是暴力！！

C语言:

#include <stdio.h>
int ans[10];

void count(int num)
{
 while(num != 0){
 ans[num % 10]++;
 num /= 10;
 }
}

int main(voi[......]
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这题不会做，那你就应该砸机子了。

C语言:

#include <stdio.h>

int main(void)
{
 int i, j;
 scanf(%d%d, &i, &j);
 printf(%d\\n, i + j);
 return 0;
}

[……]

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