[Retr0id]

Edit 3: simplified the adler32 implementation

  deflate=lambda d:b"\x78\x01"+b"".join(bytes([(i+0x8000)>=len(d)])+len(d[i:i+0x8000]).to_bytes(2,"little")+(len(d[i:i+0x8000])^0xffff).to_bytes(2,"little")+d[i:i+0x8000]for i in range(0,len(d),0x8000))+(((sum(d)+1)%65521)|(((sum((len(d)-i)*c+1 for i,c in enumerate(d)))%65521)<<16)).to_bytes(4,"big")