/in/foo.cc: In function 'void dfs(int, int)':
/in/foo.cc:18:10: error: invalid types 'int[int]' for array subscript
   if(m[xx][yy]!='*'&&!b[xx][yy]&&xx>=1&&xx<=x&&yy>=1&&yy<=y)
          ^
/in/foo.cc:21:8: error: invalid types 'int[int]' for array subscript
    m[xx][yy]='1';
        ^