pub fn aoc3_1() -> u32 {
    (|num| num * (!num & 0b111111111111))(read_file(&Path::new("inputs/aoc3/input.txt")).fold(
        vec![0; 12],
        |acc, line| acc.into_iter()
            .zip(line.chars())
            .map(|(acc, ch)| if ch == '0' { acc as i32 - 1 } else { acc as i32 + 1 })
            .collect())
        .into_iter()
        .zip(0..)
        .map(|(a, pow)| ((a.signum() + 1) / 2) as u32 * 2_u32.pow(pow))
        .sum())
}