adventofcode/2019/01a.py

def main():
    with open("01ain.txt", "r") as file:
        lines = file.readlines()
    masses = [int(x) for x in lines]
    fuels = [(x//3) - 2 for x in masses]
    print(fuels)
    print(sum(fuels))

if __name__ == "__main__":
    main()