I’m solving this problem from infytq. If someone is unable to see problem its in Day-7 > Practice problems > level-3 > problem-12, But I’m only getting 3 test cases pass out of 6. Can somebody help me in this? Its a fairly easy problem.

This is my solution in python-

```
def count_ways(n):
if n==0:
return 0
totalwayspossible = 2**n
buildingswithnospaces = int((n*(n-1))/2)
buildingswithspaces = int(totalwayspossible - buildingswithnospaces)
ans = buildingswithspaces**2
return ans
n= 2
print("Number of possible ways in which buildings can be constructed is: ",count_ways(n))
```

Please help!