% slitherlink 480 by Hobbit's Room, http://www.janko.at/Raetsel/Slitherlink/480.a.htm
slitherlink
medium-
10 10
...1.2.1.1
12...0.1..
..2.2...31
3.2.0.3...
..3.1...20
22...2.0..
...3.3.2.0
12...3.3..
..0.2...12
1.2.0.3...
