why?

noone knows

I had the same WA19. This test helped me figure out the issue

10 10
......#!#.
......##Z.
...Z......
...Z*.....
...ZKK....
......##..
.....K.##.
.....##$#.
......###.
..........
correct answer is 3, but my old code generated 4

my code gives 3, but I still got WA#19

Thank you very much! This test helped me when I had problems with test 11.