from random import randint, seed
from itertools import chain

seed(a = 10489, version=2)

flag = "IGCTF{RealEncryptionWouldHaveBeenABetterChoice}"
positions = []

while len(positions) < len(flag):
    pos = randint(0, 65536)
    if pos in positions:
        continue

    positions.append(pos)

size = max(positions)
buff = [ randint(0, 255) for _ in range(0, size+1) ]
for char, pos in zip(flag, positions):
    buff[pos] = ord(char)


with open("memory.bin", "wb") as f:
    print("Writing number of characters to the file")
    # Write the number of characters first
    v = len(flag).to_bytes(4, "little")
    f.write(v)

    print("Writing the positions to the file")
    # Write the positions as bytes to the file
    for n in positions:
        v = n.to_bytes(4, "little")
        f.write(v)

    print("Writing the data to the file")
    # Write the data to the file    
    for b in buff: 
        f.write(b.to_bytes(1, "little"))
    
print("Done")