Americans are odd people: in their buildings, the first floor is actually the ground floor and there is no 13th floor (due to superstition).

Write a function that given a floor in the american system returns the floor in the european system.

With the 1st floor being replaced by the ground floor and the 13th floor being removed, the numbers move down to take their place. In case of above 13, they move down by two because there are two omitted numbers below them.

Basements (negatives) stay the same as the universal level.

[More information here](https://en.wikipedia.org/wiki/Storey#European_scheme)

## Examples

```
1  =>  0 
0  =>  0
5  =>  4
15  =>  13
-3  =>  -3
```

Difficulty: EASY
Starter code: def get_real_floor(n):
	

Solutions:
def get_real_floor(n):
	if n <= 0:
		return n
	if n < 13:
		return n - 1
	if n > 13:
		return n - 2


def get_real_floor(n):
	return n if n < 1 else n - 1 if n < 13 else n - 2


def get_real_floor(n):
	return n - (n > 0) - (n > 13)


def get_real_floor(n):
	if n > 0 and n >= 13:
		return n - 2
	elif n > 0 and n < 13:
		return n - 1
	else:
		return n


def get_real_floor(n):
	if n <= 0:
		return n
	elif n < 14:
		return n - 1
	elif n == 14:
		return 12
	else:
		return n - 2


def get_real_floor(n):
	return n - 1 - (n > 13) if n > 0 else n


get_real_floor = lambda n: n - ((n > 0) + (n > 12))


def get_real_floor(n):
	return n - (n > 0) - (n > 12)


def get_real_floor(n):
	if n < 1:
		return n
	ls = []
	for i in range(1, n + 1):
		if i == 13:
			pass
		else:
			ls.append(i)
	return ls.index(n)


get_real_floor = lambda n: n if n <= 0 else n - 1 - int(n >= 13)


def get_real_floor(n):
	if n > 0:
		return n - (1 + int(n >= 13))
	return n


get_real_floor = lambda n: n - (n > 0) - (n > 13)


def get_real_floor(n: int) -> int:
	return sum([n, {0 < n < 13: -1, n >= 13: -2}.get(True, 0)])


def get_real_floor(n):
	if n < 13:
		if n < 0:
			o = n
		elif n == 0:
			o = 0
		else:
			o = n - 1
	elif n == 13:
		o = 0
	else:
		o = n - 2
	return o


def get_real_floor(n):
	return 0 if n == 0 or n == 1 else n - 1 if 1 < n <= 13 else n - 2 if n > 13 else n


def get_real_floor(n):
	if n <= 0:
		return n
	elif 0 < n <= 12:
		return n - 1
	elif n >= 13:
		return n - 2


def get_real_floor(n):
	if n < 0:
		return n
	if n == 0 or n == 1:
		return 0
	elif 2 <= n <= 12:
		return n - 1
	else:
		return n - 2


get_real_floor = lambda n: n - 1 - (n > 12) + (n <= 0)


def get_real_floor(n):
	return n - (n > 0 and 1) - (n > 13 and 1)


def get_real_floor(n):
	if n < 0:
		return n
	elif n > 0 and n <= 12:
		return n - 1
	elif n > 12:
		return n - 2
	else:
		return 0


def get_real_floor(n):
	floor = 0
	if n >= 1:
		floor -= 1
	if n >= 13:
		floor -= 1
	return n + floor


def get_real_floor(n):
	if n <= 0:
		return n
	if n > 0 and n < 14:
		return n - 1
	else:
		return n - 2


def get_real_floor(n):
	return n - 1 if 0 < n < 13 else n - 2 if n > 12 else n


get_real_floor = lambda n: n - 1 if n > 0 and n < 13 else n - 2 if n > 12 else n


def get_real_floor(n):
	if n > 0 and n < 13:
		real_floor = n - 1
		return real_floor
	if n >= 13:
		real_floor = n - 2
		return real_floor
	if n <= 0:
		real_floor = n
		return real_floor


def get_real_floor(n):
	if n == 0 or n == 1:
		return 0
	elif n < 0:
		return n
	elif n < 14:
		return n - 1
	else:
		return n - 2


def get_real_floor(n):
	floors = n - 1
	top = n - 2
	basement = n
	if n >= 1 and n < 13:
		return floors
	elif n <= 0:
		return basement
	else:
		return top


def get_real_floor(n):
	if n == 0 or n == 1:
		return 0
	elif n < 0:
		return n
	elif n > 13:
		return n - 2
	elif n < 13:
		return n - 1
	return n - 1


def get_real_floor(n):
	if n < 0:
		return n
	if n > 13:
		return n - 2
	else:
		return max(0, n - 1)


def get_real_floor(n):
	if n == 0 or n == 1:
		print(0)
		return 0
	if n < 13 and n > 1:
		print(n - 1)
		return n - 1
	if n > 13:
		print(n - 2)
		return n - 2
	return n


def get_real_floor(n):
	if 0 < n < 14:
		return n - 1
	if 13 < n:
		return n - 2
	else:
		return n


def get_real_floor(n):
	if 1 <= n <= 13:
		return n - 1
	elif n >= 14:
		return n - 2
	else:
		return n


def get_real_floor(n):
	if n == 0 or n < 0:
		return n
	elif n in range(1, 14):
		return n - 1
	elif n > 13:
		return n - 2


def get_real_floor(n):
	if n <= 0:
		return n
	elif n <= 13:
		return n - 1
	elif n == 15:
		return 13
	else:
		return n - 2