fn fuel_for_modules1(input: &str) -> i64 {
	let mut fuel: i64 = 0;
	for module in input.split_whitespace() {
		let module: i64 = module.parse().unwrap();
		fuel += (module / 3) - 2;
	}
	fuel
}

fn fuel_for_mass2(mass: u64) -> u64 {
	if mass <= 8 { return 0; } /* wish really hard */
	let fuel = mass / 3 - 2;
	fuel + fuel_for_mass2(fuel)
}

fn fuel_for_modules2(input: &str) -> u64 {
	let mut fuel: u64 = 0;
	for module in input.split_whitespace() {
		let module: u64 = module.parse().unwrap();
		fuel += fuel_for_mass2(module);
	}
	fuel
}

fn main() {
	let input = include_str!("input.txt");
	println!("Fuel 1: {}", fuel_for_modules1(input));
	println!("Fuel 2: {}", fuel_for_modules2(input));
}