数字特征值-python

#Digital eigenvalue.py


number = eval(input())
count = 0
Ob = 0
Ox = 0

while number > 0:
	Ob = number % 10
	count += 1
	if Ob%2 == count%2:
		Ox += pow(2,count-1)
	number = number // 10

print(Ox)