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use std::str::Split;
fn get_data(data: &mut Split<&str>) -> Vec<Vec<i64>> {
data.nth(0)
.unwrap()
.split(':')
.nth(1)
.unwrap()
.trim_start()
.split('\n')
.map(|x| x.split(' ').map(|y| y.parse::<i64>().unwrap()).collect())
.collect()
}
pub fn part1(input: &str) -> i64 {
let mut input = input.trim().split("\n\n");
let mut seeds: Vec<i64> = input
.nth(0)
.unwrap()
.split(':')
.nth(1)
.unwrap()
.trim()
.split(' ')
.map(|x| x.parse::<i64>().unwrap())
.collect();
let mut data: Vec<Vec<Vec<i64>>> = vec![];
for _ in 0..7 {
let x: Vec<Vec<i64>> = get_data(&mut input);
data.push(x);
}
// 0 -> seed-to-soil
// 1 -> soil-to-fertilizer
// 2 -> fertilizer-to-water
// 3 -> water-to-light
// 4 -> light-to-temperature
// 5 -> temperature-to-humidity
// 6 -> humidity-to-location
for d in &data {
let mut checked: Vec<i64> = vec![];
for i in d {
let drs = i[0];
let srs = i[1];
let incr = i[2];
for seed in &mut seeds {
if !checked.contains(&*seed) && *seed >= srs && *seed <= srs + incr {
*seed = *seed - srs + drs;
checked.push(*seed);
}
}
}
}
let mut res = seeds[0];
for seed in seeds {
if seed < res {
res = seed;
}
}
res
}
pub fn part2(input: &str) -> i64 {
let mut input = input.trim().split("\n\n");
let s: Vec<i64> = input
.nth(0)
.unwrap()
.split(':')
.nth(1)
.unwrap()
.trim()
.split(' ')
.map(|x| x.parse::<i64>().unwrap())
.collect();
assert_eq!(s.len() % 2, 0);
let mut seeds: Vec<i64> = vec![];
let mut i = 0;
while i < s.len() {
for j in s[i] as usize..(s[i] + s[i + 1]) as usize {
seeds.push(j as i64);
}
i += 2;
}
println!("{seeds:?}");
let mut data: Vec<Vec<Vec<i64>>> = vec![];
for _ in 0..7 {
let x: Vec<Vec<i64>> = get_data(&mut input);
data.push(x);
}
// 0 -> seed-to-soil
// 1 -> soil-to-fertilizer
// 2 -> fertilizer-to-water
// 3 -> water-to-light
// 4 -> light-to-temperature
// 5 -> temperature-to-humidity
// 6 -> humidity-to-location
for d in &data {
let mut checked: Vec<i64> = vec![];
for i in d {
let drs = i[0];
let srs = i[1];
let incr = i[2];
for seed in &mut seeds {
if !checked.contains(&*seed) && *seed >= srs && *seed <= srs + incr {
*seed = *seed - srs + drs;
checked.push(*seed);
}
}
}
}
let mut res = seeds[0];
for seed in seeds {
if seed < res {
res = seed;
}
}
res
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn example_part1() {
let input = include_str!("../example.txt");
let result = part1(input);
assert_eq!(result, 35);
}
#[test]
fn input_part1() {
let input = include_str!("../input.txt");
let result = part1(input);
assert_eq!(result, 251346198);
}
#[test]
fn example_part2() {
let input = include_str!("../example.txt");
let result = part2(input);
assert_eq!(result, 46);
}
#[test]
fn input_part2() {
let input = include_str!("../input.txt");
let result = part2(input);
assert_eq!(result, 71585);
}
}
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