#!/usr/bin/python3
import argparse

def hex2bin(hexNum: str) -> None:
    return bin(int(hexNum, 16))

parser = argparse.ArgumentParser(description="convert hex number to bin right in terminal")
parser.add_argument('-s', '--stdin', action='store_true', help="if passed takes input from terminal arguments")
parser.add_argument('number', nargs='?')

args = parser.parse_args()
if args.stdin:
    print(hex2bin(input()))
elif args.number:
    print(hex2bin(args.number))
else:
    print("something went wrong")