Week 1 Programming assignment of Course "Algorithms, Part 1" from Princeton University in Coursera
The file backwash.txt is used for backwash test. To use it, just run
$ java PercolationVisualizer backwash.txt
Don't modify anything in backwash.txt and PercolationVisualizer.java. As the latter will read
data from backwash.txt and use the API in Percolation.java file to test class Percolation.