We ran a code on a machine a few years ago. It is still running however we forgot what it was meant for. It completed n=523693181734689806809285195318 iterations of the loop and broke down. We want the answer but cannot wait a few more years. Find the answer after n iterations to get the flag.

The flag would be of the format csictf{answer_you_get_from_above}.

code.py:

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)