# --- Day 4: The Ideal Stocking Stuffer ---

# Santa needs help mining some AdventCoins (very similar to bitcoins) to use as
# gifts for all the economically forward-thinking little girls and boys.

# To do this, he needs to find MD5 hashes which, in hexadecimal, start with at
# least five zeroes. The input to the MD5 hash is some secret key (your puzzle
# input, given below) followed by a number in decimal. To mine AdventCoins, you
# must find Santa the lowest positive number (no leading zeroes: 1, 2, 3, ...)
# that produces such a hash.

# For example:

#     If your secret key is abcdef, the answer is 609043, because the MD5 hash
# of abcdef609043 starts with five zeroes (000001dbbfa...), and it is the
# lowest such number to do so.
#     If your secret key is pqrstuv, the lowest number it combines with to make
# an MD5 hash starting with five zeroes is 1048970; that is, the MD5 hash of
# pqrstuv1048970 looks like 000006136ef....

# Your puzzle input is yzbqklnj.

from hashlib import md5

_input = "yzbqklnj"


def part_1() -> None:
    end = "9" * len(_input)
    for num in range(int(end)):
        testing = _input + str(num)
        result = md5(testing.encode()).hexdigest()
        if result.startswith("0" * 5):
            print(f"The lowest positive number is {num}")
            break


# --- Part Two ---

# Now find one that starts with six zeroes.


def part_2() -> None:
    end = "9" * len(_input)
    for num in range(int(end)):
        testing = _input + str(num)
        result = md5(testing.encode()).hexdigest()
        if result.startswith("0" * 6):
            print(f"The lowest positive number is {num}")
            break


if __name__ == "__main__":
    part_1()
    part_2()