% slitherlink 649 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/649.a.htm
slitherlink
very hard
36 20
31...132...231.....21...1.2.2.......
3.3.22.23..13.2122.2...222.222.2.2..
..1222.221.....2.....032.231...2.2..
..1......2.2.12.2121.....02.2.3....3
1.1332.1131.213...2.2.22....1.2.1213
3222.131.22...2.312...123..22.3....2
..13.31.33...23....3.2312.3.2.213..1
........1.22.122...12121.1222...32.3
....2.1.3....22.222.2.3222..1.322.22
...31..30110.........221121.3.1222..
..231...2...23.312.3.22..3232.23.232
211.21......2..232....1.12.....0.1..
.3.22122.2.22.1121.212..103233...2..
..03.321....1..2.....211........22..
.21...1232.22..0123213..31..3...33.2
1....3..3.113..3.....21..22221.21.13
22.0.1..2.2.22...2.2321.2.3.2021..2.
2.33.2.2.112..232..03.33..21....2.2.
1..21322.232.23...323.....3.1.0211.2
33.3322........12...2333....3....320
