Rust: day 15 first working
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1aaba8eba8
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105
rust/src/main.rs
105
rust/src/main.rs
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@ -377,6 +377,94 @@ mod day08 {
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}
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}
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}
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}
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mod day09 {
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use std::time::Duration;
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pub fn run(_: bool) -> Duration {
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Duration::new(0, 0)
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}
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}
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mod day10 {
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use std::time::Duration;
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pub fn run(_: bool) -> Duration {
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Duration::new(0, 0)
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}
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}
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mod day11 {
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use std::time::Duration;
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pub fn run(_: bool) -> Duration {
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Duration::new(0, 0)
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}
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}
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mod day12 {
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use std::time::Duration;
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pub fn run(_: bool) -> Duration {
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Duration::new(0, 0)
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}
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}
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mod day13 {
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use std::time::Duration;
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pub fn run(_: bool) -> Duration {
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Duration::new(0, 0)
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}
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}
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mod day14 {
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use std::time::Duration;
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pub fn run(_: bool) -> Duration {
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Duration::new(0, 0)
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}
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}
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mod day15 {
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use std::time::{Duration, Instant};
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const END: usize = 30_000_000;
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pub fn run(print: bool) -> Duration {
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let input: Vec<usize> = "0,1,5,10,3,12,19"
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.split(",")
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.map(|i| i.parse().unwrap())
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.collect();
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let instant = Instant::now();
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let mut history = vec![0; END];
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let mut last = input[0];
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for turn in 0..input.len() {
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history[last] = turn;
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last = input[turn];
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}
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for turn in input.len()..2020 {
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let stored = history[last];
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history[last] = turn;
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last = if stored == 0 { 0 } else { turn - stored };
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}
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if print {
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println!("Part 1: {}", last);
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}
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for turn in 2020..END {
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let stored = history[last];
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history[last] = turn;
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last = if stored == 0 { 0 } else { turn - stored };
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}
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if print {
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println!("Part 2: {}", last);
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}
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instant.elapsed()
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}
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}
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fn main() {
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fn main() {
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let days = [
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let days = [
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day01::run,
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day01::run,
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@ -387,6 +475,13 @@ fn main() {
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day06::run,
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day06::run,
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day07::run,
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day07::run,
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day08::run,
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day08::run,
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day09::run,
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day10::run,
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day11::run,
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day12::run,
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day13::run,
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day14::run,
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day15::run,
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];
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];
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if let Some(day) = std::env::args().nth(1) {
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if let Some(day) = std::env::args().nth(1) {
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@ -395,10 +490,18 @@ fn main() {
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days[day - 1](true);
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days[day - 1](true);
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}
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}
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} else {
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} else {
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let repetitions = 2000;
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let mut total = Duration::new(0, 0);
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let mut total = Duration::new(0, 0);
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for day in 0..days.len() {
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for day in 0..days.len() {
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let first_run = days[day](false);
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if first_run.as_nanos() == 0 {
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println!("Day {:>2}: skipped", day);
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continue;
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}
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let repetitions =
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5000.min((Duration::new(5, 0).as_nanos() / first_run.as_nanos()) as u32);
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let mut elapsed = Duration::new(0, 0);
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let mut elapsed = Duration::new(0, 0);
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for _ in 0..repetitions {
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for _ in 0..repetitions {
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elapsed += days[day](false) / repetitions;
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elapsed += days[day](false) / repetitions;
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