A program that solves Sudoku puzzles
Requires Java 8 and Maven. To build this project, create a local copy of this repository and exectute mvn package from its root. To run it, execute
java -jar target/sudoku-1.0-SNAPSHOT.jar
This will read sudoku puzzles from the standard input and write their solutions to the standard output.
The 50 puzzles from Project Euler's Problem 96 are contained in the file src/main/resources/puzzles. To solve them, run
java -jar target/sudoku-1.0-SNAPSHOT.jar < src/main/resources/puzzles
A sudoku grid is represented by nine consecutive lines, each of which is made of 9 digits. The digit 0 corresponds to an empty cell. This program will ignore any lines from its input that are not part of the representation of a grid.