中间被启程日本的面试弄的没有静下心来复习算法.这样不好,基本功是硬道理.逐步恢复刷题. 题目:给一个数独(九宫格)中的一些数字,判断该数独是否有效. 即按照数独的规则,判断其行.列.小九格中是否有重复的数字.如有,即判断无效. 直接给代码吧,长期没刷题,代码质量有所下降. public boolean isValidSudoku(char[][] board) { int[] help = new int[10]; //横排检测 for(int i = 0 ; i < 9 ; i++){ for…

我没有看到这个问题,这使其在现货需求数独,害怕一直没敢做.后来我发现原来的标题就是这么简单.推断现在只有数字全不符合的就可以了棋盘上的形势的要求. 是不是正确的三个周期..人是不能满意地看到每一行.每列装不满意,每个小3*3的格男人不能满足孩子.每个小3*3格子我是用求得左上角的方法来验证的. 事实上认为数独难另一个原因是记得他在编程之美上出现过.. 那上面讨论的主要是如何构造一个数独.详细记不太清楚了,印象最深的是,要想保证有解,最好的办法是先用置换法生成一个解,然后去掉这个解中的一些位置.…

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…

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…

Write a program to solve a Sudoku puzzle by filling the empty cells. A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. Each of the digits 1-9 must occur exactly once in each column.…

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…

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…

Sudoku Solver 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 re…

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. 解题思路: 经典的NP问题,采用Dancing Links可以优化算法,参考链接:https://www.ocf.berkeley.edu/~jc…

题目描述: 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. 解题思路:…