% slitherlink 541 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/541.a.htm
slitherlink
medium-
10 10
0.1..10..3
..0...1...
..2.0.1132
2123..2...
3......1..
..0......3
...3..2211
3130.2.3..
...1...0..
0..23..3.0
