LeetCode 37 Sudoku Solver 回溯和深度遍历 还要学习

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.

解题思路：完全参考http://blog.csdn.net/linhuanmars/article/details/20748761实现，还在思考该算法的实现。