def convert (n):
    if n == 0:
        return '0'
    nums = []
    while n:
        n, r = divmod(n, 3)
        nums.append(str(r))
    return ''.join(reversed(nums))

count=0
n=1
while(n<=523693181734689806809285195318):
	str1=convert(n)
	str2=convert(n-1)
	str2='0'*(len(str1)-len(str2))+str2
	for i in range(len(str1)):
		if(str1[i]!=str2[i]):
			count+=1
	n+=1

print(count)