天下没有难写的代码

Shuffle'm Up Time Limit:1000MS Memory Limit:65536K Total Submissions:7714 Accepted:3549 Description A common pastime for poker players at a poker table is to shuffle stacks o...

食物链 Time Limit:1000MS Memory Limit:10000K Total Submissions:53916 Accepted:15774 Description 动物王国中有三类动物A,B,C，这三类动物的食物链构成了有趣的环形。A吃B， B吃C，C吃A。 现有N个动物，以1－N编号。每个动物都是A,B,C中的一种，但是...

Tempter of the Bone Time Limit:2 Seconds Memory Limit:65536 KB The doggie found a bone in an ancient maze, which fascinated him a lot. However, when he picked it up, the maze began to shake, ...

Red and Black Time Limit:1000MS Memory Limit:30000K Total Submissions:26216 Accepted:14238 Description There is a rectangular room, covered with square tiles. Each tile is co...

一个规则的实心十二面体，它的 20个顶点标出世界著名的20个城市，你从一个城市出发经过每个城市刚好一次后回到出发的城市。 Input 前20行的第i行有3个数,表示与第i个城市相邻的3个城市.第20行以后每行有1个数m,m<=20,m>=1.m=0退出. Output 输出从第m个城市出发经过每个城市1次又回到m的所有路线,如有多条路线,按字典序输出,每行1条路线.每行首先输出...

#include int t,m,n; int fun(int m,int n) { if(m==0||n==1) return 1; if(m < n) return fun(m,m);//先将一个盘子放一个苹果； else return fun(m-n,n)+fun(m,n-1);//然后将多余的苹果在往盘子里放，...

思路：直接DFS； 代码如下： #include < cstdio > #include < cstring > int n,num[15],ans,cnt[15]; void df_s(int cur) { if(cur==n)//dfs通用类型； { ans++; return ; } int i,j;...

Time Limit:1000MS Memory Limit:10000K Total Submissions:14512 Accepted:7911 Description The GeoSurvComp geologic survey company is responsible for detecting underground oil de...

Time Limit:1000MS Memory Limit:65536K Total Submissions:2532 Accepted:1574 Description Farmer John loves to help the cows further their mathematical skills. He has promised th...

Time Limit:1000MS Memory Limit:30000K Total Submissions:23303 Accepted:10928 Description Background Mr Somurolov, fabulous chess-gamer indeed, asserts that no one else but hi...

Is It A Tree? Time Limit:1000MS Memory Limit:10000K Total Submissions:26009 Accepted:8885 Description A tree is a well-known data structure that is either empty (null, void, ...

原文地址：C语言--静态变量和动态变量初始化区别作者：1234a 补充：c里等号的意义是分两种情况，一种是在表达式里， 而另一种是在变量声明中。 在变量声明中的等号不可以看作是赋值， 它只是初始化，也就是说它的意义只是告诉编译器如何初始化这个内存空间。而表达式中的 = 就是赋值的意思了。 自动变量和静态变量的初始化存在一个重要的差别。 在静态变量的初始化中，我们...

Help Me with the Game Time Limit:1000MS Memory Limit:65536K Total Submissions:3875 Accepted:2463 Description Your task is to read a picture of a chessboard position and print...

以自增运算符为例，当自增运算符++作用于一个变量时，例如：当i=3时++i这个算术表达式的值为4，同时变量i的值也由原来的3改变为4。一般情况下，计算表达式后不改变变量本身的值，而++运算符和--运算符组成的表达式计算后，则改变变量的值，这称为运算符的副作用。这类运算符在计算表达式时，一定要注意区分表达式的值和变量的值。 2　注意前缀运算和后缀运算的区别 　　仍以自增运算符为例，该运算符可作用在变...

Ubiquitous Religions Time Limit:5000MS Memory Limit:65536K Total Submissions:27748 Accepted:13594 Description There are so many different religions in the world today that it...

Sequence Median Time Limit:1000MS Memory Limit:65536K Total Submissions:16366 Accepted:4560 Description Given a sequence of N nonnegative integers. Let's define the median of...

HTML Time Limit:1000MS Memory Limit:65536K Total Submissions:6548 Accepted:2162 Description If you ever tried to read a html document on a Macintosh, you know how hard it is ...

宇航员 Time Limit:2000MS Memory Limit:30000K Total Submissions:5190 Accepted:2198 Description 问题描述： 　　宇航员在太空中迷失了方向，在他的起始位置现在建立一个虚拟xyz坐标系，称为绝对坐标系，宇航员正面的方向为x轴正方向，头顶方向为z轴正方向，则宇航员的...

A Bug's Life Time Limit:10000MS Memory Limit:65536K Total Submissions:31371 Accepted:10284 Description Background Professor Hopper is researching the sexual behavior of a ra...

Find them, Catch them Time Limit:1000MS Memory Limit:10000K Total Submissions:36652 Accepted:11242 Description The police office in Tadu City decides to say ends to the chaos...

The Suspects Time Limit:1000MS Memory Limit:20000K Total Submissions:27759 Accepted:13550 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unkno...

题意：给你一个数N（3<=N<=15);每个数之间有三种运算符“‘+’，‘-’，‘.’”。输出和值等于零的所有的运算情况及次数num，如果num大于20，则只输出前20中情况。运算符‘.’相当于连接符，例如：11.22<->1122. 思路：用dfs深搜，如果和值sum=0，则num++；注意‘.’的处理，需要用一个pre记录上一个数字，如果遇到‘.’则回溯到第一个不...