n-queens

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"Put N Queens", can it possible to run within acceptable time with N = 20?

The task is count ho开发者_运维百科w many solutions to put N queens in NxN board. I have tried to thought every possible case to improve the performace, but it take almost 50s to run with N = 15. Here[详细]

2023-03-29 05:41 分类：问答
8 queens problem using backtracking recurison

I\'ve been working on the 8 queens problem but I got stuck. I don\'t want code. I would love guidance and directions in order to understand how to solve this problem myself using backtracking recursio[详细]

2023-03-12 10:58 分类：问答
Implementation question about classic n-Queens in Java

This is a homework question. I am writing a solution for classic n-Queens problem in Java. My program l开发者_JS百科ooks like this but it returns a collection of all legal queens placements instead of[详细]

2023-01-29 16:14 分类：问答
Solving Eight Queens problem with 2-d array: IndexOutOfBounds error

One of my homework assignments is to solve the Eight Queens problem using a two dimensional array to represent the board. I keep getting an index out of bounds error:8 in my \"isUnderAttack\" method a[详细]

2023-01-23 22:46 分类：问答
Query about N- Queen solving?

I solved the N- Queen problem with the condition that there can only be one queen per column. So I place a queen in a square in first column, then move onto the next column and place a queen in a squa[详细]

2023-01-20 06:09 分类：问答
Matlab N-Queen Problem

main.m counter = 1; n = 8; board = zeros(1,n); back(0, board); disp(counter); sol.m function value = sol(board)[详细]

2023-01-02 21:23 分类：问答
8-Queens algorithm example?

Anybody kn开发者_如何学编程ows good/concise algorithm examples for 8-queens? I did a Web search and did not find any good example. Here\'s a simple Java implementation of the naive recursive algorith[详细]

2023-01-01 06:48 分类：问答
How to Solve N-Queens in Scheme?

I\'m stuck on the extended exercise 28.2 of How to Design Programs.I used a vector of true or false values to represent the board instead of using a list.This is what I\'ve got which doesn\'t work:[详细]

2022-12-26 15:10 分类：问答
LAPACK + C, weird behaviour

I am trying to solve a simple linear equations system using LAPACK. I use dbsvg method which is optimised for banded matrices. I\'ve obsereved a realy strange behaviour. When I fill the AT matrix this[详细]

2022-12-17 02:12 分类：问答