I has specified the corner cases in my code:

```
def largestRectangleArea(self, height):
if len(height) == 0 or not height:
return 0
if len(height) == 1:
return height[0]
else:
min_val, min_index = min((val, idx) for (idx, val) in enumerate(height))
left_max = self.largestRectangleArea(height[:min_index])
right_max = self.largestRectangleArea((height[min_index+1:]))
this_max = min_val*len(height)
return max(left_max, right_max, this_max)
```

However, I got TLE for:

Last executed input: [ ]

Any idea how may this happen? Many hanks!