message: doesn't need semicolon
diff: @@ -17,7 +17,7 @@ class Solution(object):
  return False
  grid[i][j] *= -1
  for k, v in directions.iteritems():
  - island.append(k);
  + island.append(k)
  dfs(i+v[0], j+v[1], grid, island)
  return True
  