HDU-1856 and query set

I just learned and checked the set. This question is also TLE several times. The key is not optimized. Code: # Include # define n Limit 001int father [N]; int sum [N]; int find (int x) {return x = Father [x]? X: Find (father [x]);} int main () {

HDU-2563. Statistical steps

This is recursive and simulated. Use L [I] to represent the number of times I walked to the left, and use R [I] to represent... The number of times you want to walk right. F [I] ...... total number of solutions. Walk left L [I] = L [I-1] + F [I-1]

Digital tower DP HDU-1176

Question connection Analysis: 0 seconds 5 1 second 4 5 6 2 seconds 3 4 5 6 7 3 seconds 2 3 4 5 6 7 8 ........................................ ....................... /* Indicates the position that can be reached in the second I */ I have

Code that prevents web pages from being embedded into the framework

From: http://goo.gl/2lY89 Two years ago, I wroteCodeTo prevent web pages from being embedded into a frame ). This code is valid. However, there is a problem: once used, no one can embed your webpage into the framework, including

Collection A-B-Binary Search

A collection A-B means that the element is in a and not in B. This question is obviously not a problem. My personal skills are limited. I like to analyze such questions. For me, this helps to cultivate my thinking ability. Even more difficult

Poj1191-dp board Division

Click Open Link Questions written in Chinese characters cannot be ignored. This question requires a good spatial imagination. A five-dimensional array DP [k] [x] [y] [XX] [YY] is opened to indicate that the diagonal line is (x, y) -(XX, YY) the

Poj1390-dp squares

Question connection Analysis: I have been entangled in this question for a long time and cannot write dynamic equations. After reading the human code, I will use a three-digit array DP [I, j, k], indicates the maximum value that can be obtained from

Poj_1088 Memory search

Question connection In Chinese, you do not have to explain the meaning too much. It may have been the longest ascending subsequence in the past, and I think this question is a bit similar. Isn't that a two-dimensional question? Actually, this

Returns the remainder of a large number.

Since learning ACM, yefeng has told people that he can quickly determine whether a positive integer number is a prime number. Later, we guess he only knows how to determine the number within 10 ^ 18. So I want to ask him with a very large number. Of

Locate the vertex that is not covered by the interval

There are n vertices. Each vertex has a weight value and the initial value is 0. Next, perform M operations. The operation content is [a, B) or [B, a). Set the vertex I weight in the interval to 1, calculates the number of vertex weights

Judge the values of two double

To determine whether two double types are equal, you cannot compare them using the int type method. This is also an easy-to-use error for beginners. At the beginning, when I was doing the poj1730 question, this is the case. The answer is always

HDU-4649 DP Compression

This is good. # Include # include # include using namespace STD; double DP [205] [25]; Double P [205]; char op [205]; int num [205]; int N; void solve () {for (INT I = 1; I J) & 1; if (OP [I] = '&') {If (TMP) DP [I] [J] = DP [I-1] [J]; else

Maximum continuous suborder of HDU-1003 and

The idea of this question is very simple, as long as the continuous addition of and greater than or equal to zero, will continue to add, if in the first I-1 item Less Than Zero, assign the value of sum to the value of the sequence I. And record its

Large number of HDU-1002 A + B

This question is a simulated addition, and there is no difficulty. # Include # include char ST1 [1005], st2 [1005]; int st3 [2005]; void add () {int I1 = strlen (ST1)-1, I2 = strlen (st2) -1; int carry = 0, TMP, I, j = 0; For (; I1> = 0 & I2> =

Six principles of design patterns (6): Open and closed principles

Reproduced in: http://blog.csdn.net/zhengzhb/article/details/7296944 Definition:A software entity, such as classes, modules, and functions, should be open to extensions and closed to modifications. Problem:During the software life cycle, errors may

IDE is not the only choice for programmers (especially window programmers)

IDE is not the only choice for programmers: Http://blog.codingnow.com/2008/09/replacement_of_ide_1.html    Build a simple and common development environment in VIM   Http://app.cnzer.cn/html-77728-1.html   Hands-on instructions

HDU-1058 humble numbers

Recently, I felt that dynamic planning was too bad. I found some basic DP questions on the major OJ. This DP question, although it is an entry-level question. But it is also tricky for me! 1 --> 1 2 ---> min (1*2, 1*3, 1*5, 1*7) ----> 2 3 ---> min (2

Identification and maximum number of matching of HDU-2444 bipartite graph.

Question: N people are m-aligned and ask if you can divide them into two groups so that they do not know each other. If "no" cannot be output, ask the most people they know. Analysis: The meaning of the question is clear. We need to determine

Article 1 Application Fundamentals)

Address: http://developer.android.com/guide/components/fundamentals.html Objective: To have a basic understanding of Android applications and quickly understand the components of an Android Application, refer to training: BuildingYou can build a

[Reprinted] the debug version of The isspace function has problems with Chinese processing.

From: http://www.cppblog.com/luonjtu/archive/2009/03/12/76332.html   The debug version of isspace function in VC 2005 SP1 has problems with Chinese processing. Today, I encountered a strange problem. A piece of code from someone else was first

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