可行性方案之一
#进制计算
binary = input()
weight = 0
if binary == '2':
weight = 2
elif binary == '8':
weight = 8
elif binary == '10':
weight = 10
else:
weight = 16
a = input()
n1 = a
n2 = a+a
n3 = a+a+a
n4 = int(n1,weight)+ int(n2,weight)+int(n3,weight)
print (n4)