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4e62401f62
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1
input/day06
Normal file
1
input/day06
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@ -0,0 +1 @@
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3,3,5,1,1,3,4,2,3,4,3,1,1,3,3,1,5,4,4,1,4,1,1,1,3,3,2,3,3,4,2,5,1,4,1,2,2,4,2,5,1,2,2,1,1,1,1,4,5,4,3,1,4,4,4,5,1,1,4,3,4,2,1,1,1,1,5,2,1,4,2,4,2,5,5,5,3,3,5,4,5,1,1,5,5,5,2,1,3,1,1,2,2,2,2,1,1,2,1,5,1,2,1,2,5,5,2,1,1,4,2,1,4,2,1,1,1,4,2,5,1,5,1,1,3,1,4,3,1,3,2,1,3,1,4,1,2,1,5,1,2,1,4,4,1,3,1,1,1,1,1,5,2,1,5,5,5,3,3,1,2,4,3,2,2,2,2,2,4,3,4,4,4,1,2,2,3,1,1,4,1,1,1,2,1,4,2,1,2,1,1,2,1,5,1,1,3,1,4,3,2,1,1,1,5,4,1,2,5,2,2,1,1,1,1,2,3,3,2,5,1,2,1,2,3,4,3,2,1,1,2,4,3,3,1,1,2,5,1,3,3,4,2,3,1,2,1,4,3,2,2,1,1,2,1,4,2,4,1,4,1,4,4,1,4,4,5,4,1,1,1,3,1,1,1,4,3,5,1,1,1,3,4,1,1,4,3,1,4,1,1,5,1,2,2,5,5,2,1,5
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@ -37,7 +37,7 @@ impl Day for Day05 {
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}
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}
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fn covered_twice(vents: &Vec<Path>) -> usize {
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fn covered_twice(vents: &[Path]) -> usize {
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let mut m = HashMap::new();
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for vent in vents {
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for cover in &vent.covers {
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82
src/day06.rs
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82
src/day06.rs
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use std::collections::HashMap;
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use crate::Day;
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pub struct Day06(Vec<u8>);
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impl Day for Day06 {
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fn init(content: String) -> Self {
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Self(content.split(',').map(|x| x.parse().expect("This is not an int!")).collect::<Vec<_>>())
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}
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fn part1(&self) -> String {
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format!("{}", self.do_hashmap_magic(80))
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}
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fn part2(&self) -> String {
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format!("{}", self.do_hashmap_magic(256))
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}
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}
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impl Day06 {
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fn do_hashmap_magic(&self, days: u64) -> u64 {
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let x = self.0.clone();
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let mut hm = HashMap::<u8, u64>::new();
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for z in x {
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let e = hm.entry(z).or_insert(0);
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*e += 1;
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}
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for _ in 0..days {
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let mut to_add = 0;
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for num in 0..=8 {
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if num == 0 {
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to_add = *hm.get(&0).unwrap_or(&0);
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} else {
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let entry = { *hm.get(&num).unwrap_or(&0) };
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let prev = hm.entry(num - 1).or_insert(0);
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*prev = entry;
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}
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}
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{
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let en = hm.entry(8).or_insert(0);
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*en = to_add;
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}
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{
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let en = hm.entry(6).or_insert(0);
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*en += to_add;
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}
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}
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hm.values().sum::<u64>()
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}
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}
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#[cfg(test)]
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mod tests {
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use crate::day06::Day06;
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use crate::day::Day;
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const INPUT: &str = r"3,4,3,1,2";
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#[test]
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fn part1_test() {
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let d = Day06::init(INPUT.to_string());
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assert_eq!("5934", d.part1());
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}
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#[test]
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fn part2_test() {
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let d = Day06::init(INPUT.to_string());
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assert_eq!("26984457539", d.part2());
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}
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#[test]
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fn part1_real() {
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let d = Day06::init(crate::load_input("06"));
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assert_eq!("362740", d.part1());
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}
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#[test]
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fn part2_real() {
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let d = Day06::init(crate::load_input("06"));
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assert_eq!("1644874076764", d.part2());
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}
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}
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@ -6,6 +6,7 @@ use crate::day02::Day02;
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use crate::day03::Day03;
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use crate::day04::Day04;
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use crate::day05::Day05;
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use crate::day06::Day06;
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use crate::day::Day;
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mod day;
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mod day03;
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mod day04;
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mod day05;
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mod day06;
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fn load_input(day: &str) -> String {
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read_to_string(format!("./input/day{}", day)).expect("Could not load input")
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Box::new(Day02::init(load_input("02"))),
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Box::new(Day03::init(load_input("03"))),
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Box::new(Day04::init(load_input("04"))),
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Box::new(Day05::init(load_input("05")))];
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Box::new(Day05::init(load_input("05"))),
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Box::new(Day06::init(load_input("06")))];
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let _verbosity = matches.occurrences_of("v");
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if matches.is_present("all") {
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