% slitherlink 540 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/540.a.htm
slitherlink
medium-
10 10
.1.1.3....
.11.0..310
.0...2..3.
...0..2..1
2.0.11..3.
.3..31.1.2
2..2..1...
.1..3...2.
223..3.21.
....1.0.1.
