% slitherlink 542 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/542.a.htm
slitherlink
medium-
10 10
....1...1.
11230.2.2.
....11..0.
.2..1...1.
..1...3103
1202...1..
.2...3..0.
.3..23....
.3.0.20233
.2...3....
