题目:给定一个数独,某些部分已经被填上了数字,其余空的地方用‘.’表示:判断给定的数独是否有效: 数独规则: 每一行不能有重复的数字:每一列不能有重复的数字:将数独框划分为三行三列,没9个小方格不能有重复: 解题思路: 该题目不要判断整个数独是否有解,只需要判断当前给出的数独是否有效.因此只需要判断行和列是否有效,判断每个块是否有效.而判断一行中是否有重复的数字,最好的数据结构莫过于Set结构了. 使用rowSet,colSet两个Set结构来分别保存当前遍历的行和列,(i, j)表示行,则(j…

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…

题目: 判断数独是否合法 请判定一个数独是否有效.该数独可能只填充了部分数字,其中缺少的数字用 . 表示. 样例 下列就是一个合法数独的样例. 注意 一个合法的数独(仅部分填充)并不一定是可解的.我们仅需使填充的空格有效即可. 说明 什么是 数独? http://sudoku.com.au/TheRules.aspx http://baike.baidu.com/subview/961/10842669.htm 解题: 感觉这很难到不知道如何进行,在这里看到,只需判断每行,每类,每个小3*3矩阵…

［抄题］: Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: Each row must contain the digits 1-9 without repetition. Each column must contain the digits 1-9 without repetition. Each of…

判断一个 9x9 的数独是否有效.只需要根据以下规则,验证已经填入的数字是否有效即可. 数字 1-9 在每一行只能出现一次. 数字 1-9 在每一列只能出现一次. 数字 1-9 在每一个以粗实线分隔的 3x3 宫内只能出现一次. 上图是一个部分填充的有效的数独. 数独部分空格内已填入了数字,空白格用 '.' 表示. 示例 1: 输入: [ ["5","3",".",".","7","."…

1. Search in Rotated Sorted Array Suppose an array sorted in ascending order is rotated(轮流,循环) at some pivot(枢轴; 中心点) unknown to you beforehand(提前; 事先). (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If foun…

Valid Sudoku 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 boa…

LeetCode:36. Valid Sudoku,数独是否有效 : 题目: LeetCode:36. Valid Sudoku 描述: 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 partiall…

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…

三星机试也考了类似的题目,只不过是要针对给出的数独修改其中三个错误数字,总过10个测试用例只过了3个与世界500强无缘了 36. Valid Sudoku 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…