Sudoku 算法 标签(空格分隔): 软工实践 设想:通过第一行,来生成2, 3行的排列,再通过1 - 3 生成4 - 6排列. 2 3 行的生成由上一行生成 公式为$grid[i][j] = grid[i][(j + 3)%9] $ 即第二行由第一行向右平移3个位置,第三行由第一行向右平移6个位置. 这样前三行满足:每一行都有1-9,前3个3*3的方块也都有1-9. 例如: line1: 5 1 2 3 4 6 7 8 9 line2: 3 4 6 7 8 9 5 1 2 line3: 7…

关于Hadoop的用户体系设计设想 Hadoop并没有一个完整的用户体系,其权限控制的对象,主要是Linux的其它用户(即非安装Hadoop的用户),控制方式也和Linux的文件权限很像,目前权限控制的方式有两种,ACL和kerberos(kb较复杂一点,曾经将朕折磨的欲仙欲死). 那么,产生问题: hadoop集群是否应该每个节点都建一样的用户,比如节点1有user1,那么是否其它节点都应该有user1 当有并不是直接用在线节点的机器操作集群时,比如第三方web管理,比如配了接口机,算谁在操作…

题目链接:Sudoku Solver | LeetCode OJ Write a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by the character '.'. You may assume that there will be only one unique solution. A sudoku puzzle... ...and its solution n…

Write a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by the character '.'. You may assume that there will be only one unique solution. A sudoku puzzle... ...and its solution numbers marked in red. 这道求解数独的题是在之…

Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled sudoku which is valid. Note:A valid Sudoku board (partially…

Problem: Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled sudoku which is valid. Note:A valid Sudoku board (p…

题目简述: Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled sudoku which is valid. Note: A valid Sudoku board (par…

SudoKu Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%lld & %llu POJ 2676 Description Sudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller squares 3x3 as shown on the Figure. In some of the c…

Sudoku Time Limit : 3000/1000ms (Java/Other)   Memory Limit : 65535/65535K (Java/Other) Total Submission(s) : 19   Accepted Submission(s) : 5 Problem Description Yi Sima was one of the best counselors of Cao Cao. He likes to play a funny game himself…

July 19, 2015 Problem statement: Write a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by the character '.'. You may assume that there will be only one unique solution. Solution 1:  Great blog to read: http://…