Java for LeetCode 037 Sudoku Solver

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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，暴力枚举即可，采用Dancing Links可以优化算法，参考链接：https://www.ocf.berkeley.edu/~jchu/publicportal/sudoku/sudoku.paper.html

JAVA实现如下：

Java for LeetCode 037 Sudoku Solver

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原文地址：http://www.cnblogs.com/tonyluis/p/4488727.html