% hashiwokakero 320 by Otto Janko, http://www.janko.at/Raetsel/Hashi/320.a.htm
hashiwokakero
medium
17 17
2..3.3..2..2..3.2
.3..3..2..2..1.1.
1....2..2..2..3.2
......2..3..1....
.4..4..1.......3.
......1..3.2..2..
2.4.3...........2
.2...3.6.6..5..5.
2...............2
..5.6..4.6..7..3.
2..1.............
..2.6..4..1.....2
.3.2.....1..5..4.
2...3..3..4...1.2
..1............1.
.2.3..2.2.4.4.4.2
2.2..2.3.3.3.3.1.
