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.
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A sudoku puzzle...
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...and its solution numbers marked in red.
{优快云:CODE:633020}

本文介绍了一个程序设计问题,即通过填充空单元格来解决数独谜题。空单元格用字符'.'表示,可以假设每个谜题只有一个唯一解。
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