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pub fn part1(input: &str) -> u32 {
let mut res: u32 = 0;
for line in input.split('\n') {
let mut d1: i32 = -1;
let mut d2: i32 = -1;
for ch in line.chars() {
if ch.is_digit(10) {
if d1 == -1 {
d1 = ch.to_digit(10).unwrap() as i32 * 10;
}
d2 = ch.to_digit(10).unwrap() as i32;
}
}
if d1 + d2 > 0 {
res += (d1 + d2) as u32;
}
}
res
}
pub fn part2(input: &str) -> u32 {
let mut res: u32 = 0;
let hs: [(&str, u32); 18] = [
("one", 1),
("1", 1),
("two", 2),
("2", 2),
("three", 3),
("3", 3),
("four", 4),
("4", 4),
("five", 5),
("5", 5),
("six", 6),
("6", 6),
("seven", 7),
("7", 7),
("eight", 8),
("8", 8),
("nine", 9),
("9", 9),
];
for (i, line) in input.strip_suffix('\n').unwrap().split('\n').enumerate() {
let mut idx: Vec<(i32, u32)> = vec![];
for (k, v) in &hs {
let ms: Vec<_> = line.match_indices(k).collect();
for m in ms.iter() {
idx.push((m.0 as i32, *v));
}
}
idx.sort_by(|a, b| a.0.cmp(&b.0));
println!("{i} {}", idx[0].1 * 10 + idx[idx.len() - 1].1);
res += idx[0].1 * 10 + idx[idx.len() - 1].1;
}
res
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn example_part1() {
let input = include_str!("../example.txt");
let result = part1(input);
assert_eq!(result, 142);
}
#[test]
fn input_part1() {
let input = include_str!("../input.txt");
let result = part1(input);
assert_eq!(result, 54159);
}
#[test]
fn example_part2() {
let input = include_str!("../example2.txt");
let result = part2(input);
assert_eq!(result, 281);
}
#[test]
fn input_part2() {
let input = include_str!("../input2.txt");
let result = part2(input);
assert_eq!(result, 53866);
}
}
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