pub fn part_one(input: &str) -> Option<u32> {
    let inlines = input.split("\n");
    let mut count: u32 = 0;
    let mut elves: Vec<u32> = vec![];
    for l in inlines {
        match l {
        "" => { elves.push(count); count = 0},
        _ => { count += l.parse::<u32>().unwrap() }
        }
    }

    let mut largest = 0;

    for e in elves {
        if e > largest {
            largest = e;
        }
    }

    Some(largest)
}

pub fn part_two(input: &str) -> Option<u32> {
    let inlines = input.split("\n");
    let mut count: u32 = 0;
    let mut elves: Vec<u32> = vec![];
    for l in inlines {
        match l {
        "" => { elves.push(count); count = 0},
        _ => { count += l.parse::<u32>().unwrap() }
        }
    }

    elves.sort();
    elves.reverse();
    elves.truncate(3);

    Some(elves.iter().sum::<u32>())

}

fn main() {
    let input = &advent_of_code::read_file("inputs", 1);
    advent_of_code::solve!(1, part_one, input);
    advent_of_code::solve!(2, part_two, input);
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_part_one() {
        let input = advent_of_code::read_file("examples", 1);
        assert_eq!(part_one(&input), Some(24000));
    }

    #[test]
    fn test_part_two() {
        let input = advent_of_code::read_file("examples", 1);
        assert_eq!(part_two(&input), None);
    }
}