Lemon and Tangerine

Description:

My mom told me to buy lemons and tangerines but she only speaks binary, I totally forgot which is label as “1” or “0”.

• Category: Cryptography

Flag format: CTF{flag}

Solutions:

emoji_string = """
🍋🍊🍋🍋🍋🍋🍊🍊🍋🍊🍋🍊🍋🍊🍋🍋🍋🍊🍋🍋🍋🍊🍊🍋🍋🍊🍊🍊🍊🍋🍊🍊🍋🍊🍊🍋🍊🍊🍋🍊🍋🍊🍋🍋🍊🍊🍊🍊🍋🍊🍊🍋🍊🍊🍋🍊🍋🍊🍋🍊🍊🍊🍊🍊🍋🍊🍊🍊🍋🍋🍊🍊🍋🍊🍊🍋🍋🍋🍊🍊🍋🍋🍊🍊🍋🍋🍋🍋🍋🍋🍊🍊🍋🍋🍋🍊🍋🍊🍊🍋🍋🍊🍋🍋🍋🍊🍊🍋🍋🍊🍋🍊🍋🍊🍊🍋🍋🍊🍋🍋🍋🍊🍋🍊🍊🍊🍊🍊🍋🍊🍊🍋🍊🍊🍋🍊🍋🍋🍊🍊🍋🍋🍊🍊🍋🍊🍋🍊🍊🍊🍊🍊🍋🍊🍊🍋🍋🍋🍊🍋🍋🍋🍊🍊🍋🍋🍊🍊🍋🍊🍋🍋🍊🍋🍋🍊🍋🍊🍊🍋🍊🍊🍊🍋🍋🍊🍋🍋🍋🍊🍊🍊🍋🍊🍋🍊🍊🍊🍊🍊🍋🍊🍊🍋🍋🍋🍋🍊🍋🍊🍋🍊🍊🍊🍊🍊🍋🍊🍋🍋🍋🍊🍋🍋🍋🍊🍋🍊🍋🍊🍋🍊🍋🍊🍋🍋🍊🍊🍋🍊🍋🍊🍋🍋🍋🍋🍊🍋🍋🍊🍋🍋🍋🍋🍋🍊🍋🍊🍋🍊🍊🍋🍊🍋🍋🍊🍋🍊🍊🍋🍊🍋🍋🍊🍊🍊🍊🍊🍋🍊
"""

def decode(emoji):
  emoji_map = {"🍊":"1","🍋":"0"}
  binary = ""
  for e in emoji:
    binary+=emoji_map.get(e,"")
  return binary

flag = decode(emoji_string)
print(flag)

Output:: 0100001101010100010001100111101101101101010011110110110101011111011100110110001100110000001100010110010001100101011001000101111101101101001100110101111101100010001100110100100101101110010001110101111101100001010111110100010001010101010011010100001001000001010110100101101001111101

echo "0100001101010100010001100111101101101101010011110110110101011111011100110110001100110000001100010110010001100101011001000101111101101101001100110101111101100010001100110100100101101110010001110101111101100001010111110100010001010101010011010100001001000001010110100101101001111101" | perl -lpe '$_=pack"B*",$_'

Challenge Creation:

This challenge was inspired by the characters from the movie “Bullet Train”.