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static DAY: u8 = 1;
fn main() {
let input = advent::read_lines(DAY);
println!("{DAY}a: {}", most_calories_elf(&input, 1));
println!("{DAY}b: {}", most_calories_elf(&input, 3));
}
fn most_calories_elf(input: &[String], elf_count: usize) -> u32 {
let mut input = input.to_vec();
let mut calories = Vec::new();
let mut current = 0;
input.push("".to_string());
for line in input {
if line.as_str().is_empty() {
calories.push(current);
current = 0;
continue;
}
current += line.parse::<u32>().unwrap();
}
calories.sort();
calories.iter().rev().take(elf_count).sum()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test() {
let input = [
"1000".to_string(),
"2000".to_string(),
"3000".to_string(),
"".to_string(),
"4000".to_string(),
"".to_string(),
"5000".to_string(),
"6000".to_string(),
"".to_string(),
"7000".to_string(),
"8000".to_string(),
"9000".to_string(),
"".to_string(),
"10000".to_string(),
];
assert_eq!(most_calories_elf(&input, 1), 24000);
assert_eq!(most_calories_elf(&input, 3), 45000);
}
}
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