% slitherlink 461 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/461.a.htm
slitherlink
medium-
10 10
1..0..3..0
.3..20..2.
..0....3..
3..3..1..0
.2..3...1.
.1...0..1.
0..3..2..3
..1....3..
.3..02..3.
3..3..0..2
