% slitherlink 548 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/548.a.htm
slitherlink
medium-
10 10
.2.1.0.3..
.3.....212
031.0..3..
.....3...1
3..312.0..
..2.123..0
3...1.....
..1..1.123
233.....2.
..0.3.1.0.
