fibonacci queen

C language is the first language I learned in my professional courses in my freshman year, almost five years ago. I recently bought a copy of The Plauger bull I sorted out the document a few days ago and found this section of the N queen algorithm implemented by C bit. It took me half a day to figure it out .. As we all know, the general solution of Queen n is backtracking. We need to use a two-dimensional

DescriptionN-Queens are placed in the N*n's checkered checkerboard, making them not attack each other (that is, any 2 queens are not allowed to be in the same row, in the same column, or in a diagonal line with a 45-angle checkerboard border.)Your task is to find out how many legal placement methods are available for a given n.InputThere are several lines, one positive integer n≤10 per line, indicating the number of boards and queens, or, if n=0, the end.OutputA number of rows, one positive inte

The N Queen question is a classic question, placing n queens on a n*n board, one for each line and making it impossible to attack each other (the Queen on the same line, the same column, and the same slash will automatically attack)Import org.junit.test;/** * @author Administrator * recursively place n Queen by line, you can avoid the condition "the position of t

/*dfs, the key: Check the status of the Queen will attack. Two methods: (Second, faster) (1) void Solve (int row, int colused); General approach, the method of judging whether the state is illegal: column through the bitwise operation; left oblique, right oblique through traversal. (2) void solvebitoperation (unsigned col, unsigned tiltleft, unsigned tiltright), full-bit operation, specific reference code comment. Also can refer to Matrix67 's blog

Topic link = = "http://www.bnuoj.com/v3/problem_show.php?pid=4299Test instructions: A x*y on the chessboard put N Queens, and then put a queen, there are a few spaces can be placed, if and already on the board of Queen different rows of different columns of different slashesIdea: Each point in the four straight lines, can not be put queen, so a bit of the line ma

Title DescriptionThe Queen of Byteland is loved by the people. In order to express their love, the citizens intend to occupy a new country and name it in the name of the Queen. There are n cities in this country. There are two-way road connections between cities, and there is only one road between each of the two cities. Each city has a certain benefit for its owners. Although the citizens loved their

iteration process, which is called backtracking. Next, let's take a look at the core idea of the algorithm based on examples. This is my own code, so the quality may not be very high in some places. In the following code, I define the constraint function as Place, and the name of the Backtracking function can be defined at will. Observe the structure of the Backtracking function. N queen's question: Place n queens that are not under attack on the chessboard of n × n grids. According to the ru

Some bosses are reluctant to face the reality. You told them: "We cannot meet your requirements on time ." They don't seem to have heard of you. They looked at you and told you, "I believe that you will be able to get it done on time as long as you are above your mind ." You sat there speechless, but they walked happily, as if the project could be delivered before the date they gave. In such a situation, you just met "reject the Queen. There are many

Tags: DFS pruning Recursion N queen's question Time Limit: 2000/1000 MS (Java/others) memory limit: 32768/32768 K (Java/Others) Total submission (s): 8525 accepted submission (s): 3802 Problem description There are n queens on the N * n checkboard so that they do not attack each other (that is, two queens are not allowed to be in the same row, in the same column, it is not allowed to be on a diagonal line with 45 corners of the checker border.Your task is to determine the number of va

The eight-queen code of the python statement, from the basic Python tutorial, is short and can print 92 results at a time compared with other languages. At the same time, it can be extended to the ten queen problem after the nine emperors. Problem: On an 8x8 board, each row is placed with a queen flag, and they do not conflict. Conflict definition: the same colum

Eight Queen's problem is an old and famous problem, which is a typical example of backtracking algorithm. The issue was 19th century by the famous mathematician Gauss 1850 presented:Put eight queens on the 8x8 chess, so that they cannot attack each other, that is, any two queens cannot be on the same line, the same column, or the same slash(slope is 1), ask how many kinds of pendulum method. Gauss thinks there are 76 kinds of schemes. In 1854, in the Chess magazine in Berlin, different authors

(writing this article is mainly tomorrow exam, algorithm exam, today do not want to review, Xiang today also opened the blog, so on this platform to review, should be more efficient. Finally wish me to test a good result tomorrow. Hehe ... ）The problem of n Queens is mainly applied to backtracking methods. First select a path to calculate, if the condition is not satisfied, the backtracking, select another path to calculate.I think backtracking: just want to be in the maze, first select a road t

PHP implementation of the eight Queen problem can be extended to the N queen　　PHP implementation eight Queen problem

N queen's question Time Limit: 2000/1000 MS (Java/others) memory limit: 32768/32768 K (Java/Others)Total submission (s): 1757 accepted submission (s): 772 Problem description places n queens on the square board of N * n so that they do not attack each other (that is, two queens are not allowed to be in the same row, the same column, it is not allowed to be on a diagonal line with 45 corners of the checker border. Your task is to determine the number of valid placement methods for the given n. T

Poj3239 Solution to the n Queens Puzzle (n queen problem) Solution to NQueens Puzzle Time Limit:1000 MS Memory Limit:131072 K Total Submissions:3494 Accepted:1285 Special Judge Description The eight queens puzzle is the problem of putting eight chess queens on an 8 × 8 chessboard such that none of them is able to capture any other. The puzzle has been generalized to arbitraryN×NBoards. GivenN, You are t

Hdu 2553 N queen problem Classic search, DFS SolutionN queen's questionTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 10239 Accepted Submission (s): 4609Problem Description places N queens on the square board of N * N so that they do not attack each other (that is, two queens are not allowed to be in the same row, the same column, it is not allowed to be on a diagonal line with 45 corners of the c

N Queen problem, one of the most basic backtracking problems, test instructions simple n*n square lattice to place n Queens, any two queens can not appear on the same line or slash, to find different n corresponding solution.Summary: N>13, the number of large, primary backtracking can only guarantee a quick answer in the case of nIndicates that the Queen in the first row has been placed, and on the second c

Relatively simple, nonsense not to say, on the code: Public classNqueen {//For example: Position[1]=3, which indicates that the third column of the first row has a queen Private int[] position; //total number of methods Private intTotal ; Private intNumofqueens; PublicNqueen (intNthrowsException {if(n) Throw NewException ("Can not be negative ..."); Else { //Position[0] Noposition=New int[N+1]; Numofqueens=N; Total=

DescriptionN-Queens are placed in the N*n's checkered checkerboard, making them not attack each other (that is, any 2 queens are not allowed to be in the same row, in the same column, or in a diagonal line with a 45-angle checkerboard border.)Your task is to find out how many legal placement methods are available for a given n.InputThere are several lines, one positive integer n≤10 per line, indicating the number of boards and queens, or, if n=0, the end.OutputA number of rows, one positive inte

solution, first in the first column a place to place a queen, Mark line number Row[i] (Row[i] can not put the Queen, or conflict), and then in the second column to find possible legal position, BLABLABLA, until the N queen all put, recursion end. There may be doubts when judging the feasibility. The judgment is sure to be OK, in judging the slash, we use the slo