A simple CTF question

I haven't played CTF for a long time, and my classmates sent a question to try.

WP

The compressed package is opened as a text file and a flag.rar

The text is just a sentence, blind guess 0 width steganography, press the direction key several times at the front of the cursor before moving to the back of C, 0 width solid hammer

再次实锤

decode it in https://330k.github.io/misc_tools/unicode_steganography.html

got the password of the flag:Cetacean

unzip flag.rar and got flag.txt

there was 'E' and 'e' in the flag.txt,I to replace them with '0' and '1'

then split them with lenth of 16

find the flag after an ascii decode : flag{Cetac4an_C1pher_1s_a_g0od_eNc0de!!!!}

decode

s="000000000110011000000000011011000000000001100001000000000110011100000000011110110000000001000011000000000110010100000000011101000000000001100001000000000110001100000000001101000000000001100001000000000110111000000000010111110000000001000011000000000011000100000000011100000000000001101000000000000110010100000000011100100000000001011111000000000011000100000000011100110000000001011111000000000110000100000000010111110000000001100111000000000011000000000000011011110000000001100100000000000101111100000000011001010000000001001110000000000110001100000000001100000000000001100100000000000110010100000000001000010000000000100001000000000010000100000000001000010000000001111101"index=0ss=''result=''for i in s:
    
    index=index+1
    if index%17==0:
        index=1
        print(ss)
        print(ss[8:])
        tar='0b'+ss[8:]
        result=result+chr(eval(tar)) 
        ss=i        
    else:
        ss=ss+i

tar='0b'+ss[8:]result=result+chr(eval(tar))print(result)