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Merge branch 'master' of code.aceofba.se:logaritmisk/adventofcode

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This commit is contained in:
Anders Olsson
2019-12-02 10:17:16 +01:00
parent 38be740633 6f67ea2b0c
commit 5e1a0811f6
52 changed files with 1994 additions and 0 deletions
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2018/04/Cargo.toml Normal file
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[package]
name = "day-04"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]
chrono = "0.4"
regex = "1.1"

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use std::collections::HashMap;
use std::io::{self, BufRead};
use chrono::prelude::*;
use regex::{Captures, Regex};
#[derive(Debug)]
struct Entry {
date: DateTime<Utc>,
event: Event,
}
#[derive(Debug)]
enum Event {
BeginShift { guard_id: u16 },
FallsAsleep,
WakesUp,
}
enum State {
Default,
Guard(u16),
FallsAsleep(u16, DateTime<Utc>),
}
fn date_from_captures(caps: &Captures<'_>) -> DateTime<Utc> {
let year = caps
.get(1)
.expect("faild to find year")
.as_str()
.parse::<i32>()
.expect("faild to parse year");
let month = caps
.get(2)
.expect("faild to find month")
.as_str()
.parse::<u32>()
.expect("faild to parse month");
let day = caps
.get(3)
.expect("failed to find day")
.as_str()
.parse::<u32>()
.expect("faild to parse day");
let hour = caps
.get(4)
.expect("faild to find hour")
.as_str()
.parse::<u32>()
.expect("faild to parse hour");
let minute = caps
.get(5)
.expect("failed to find minute")
.as_str()
.parse::<u32>()
.expect("faild to parse minute");
Utc.ymd(year, month, day).and_hms(hour, minute, 0)
}
fn main() {
let re_begin_shift =
Regex::new(r"\[(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2})\] Guard #(\d+) begins shift")
.expect("failed to build regex");
let re_falls_asleep = Regex::new(r"\[(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2})\] falls asleep")
.expect("failed to build regex");
let re_wakes_up = Regex::new(r"\[(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2})\] wakes up")
.expect("failed to build regex");
let mut entries = io::stdin()
.lock()
.lines()
.filter_map(Result::ok)
.map(|line| {
if let Some(caps) = re_begin_shift.captures(&line) {
Entry {
date: date_from_captures(&caps),
event: Event::BeginShift {
guard_id: caps
.get(6)
.expect("failed to find y")
.as_str()
.parse::<u16>()
.expect("faild to parse y"),
},
}
} else if let Some(caps) = re_falls_asleep.captures(&line) {
Entry {
date: date_from_captures(&caps),
event: Event::FallsAsleep,
}
} else if let Some(caps) = re_wakes_up.captures(&line) {
Entry {
date: date_from_captures(&caps),
event: Event::WakesUp,
}
} else {
panic!("failed to parse line: {}", line);
}
})
.collect::<Vec<_>>();
entries.sort_by_key(|entry| entry.date);
let entries = entries;
let mut minute_asleep = HashMap::new();
let mut minutes_asleep = HashMap::new();
let mut state = State::Default;
for entry in &entries {
match (state, &entry.event) {
// Default.
(State::Default, Event::BeginShift { guard_id }) => {
state = State::Guard(*guard_id);
}
(State::Default, _) => panic!("oh no"),
// Guard.
(State::Guard(_), Event::BeginShift { guard_id }) => state = State::Guard(*guard_id),
(State::Guard(guard_id), Event::FallsAsleep) => {
state = State::FallsAsleep(guard_id, entry.date);
}
(State::Guard(_), _) => panic!("oh no"),
// FallsAsleep.
(State::FallsAsleep(guard_id, date), Event::WakesUp) => {
state = State::Guard(guard_id);
for m in date.minute()..entry.date.minute() {
minute_asleep
.entry((guard_id, m))
.and_modify(|x| *x += 1)
.or_insert(1);
}
let duration = entry.date - date;
minutes_asleep
.entry(guard_id)
.and_modify(|x| *x += duration.num_seconds())
.or_insert(0);
}
(State::FallsAsleep(_, _), _) => panic!("oh no"),
}
}
let (guard_id, minutes) = minutes_asleep
.iter()
.max_by_key(|(_, asleep)| *asleep)
.expect("failed to find guard");
let (minute, _) = minute_asleep
.iter()
.filter(|((guard, _), _)| guard == guard_id)
.map(|((_, minute), total)| (minute, total))
.max_by_key(|(minute, total)| *total)
.expect("failed to find minute");
println!("part.one={}", *guard_id as u32 * *minute);
let (guard_id, minute, _) = minute_asleep
.iter()
.map(|((guard, minute), total)| (guard, minute, total))
.max_by_key(|(guard, minute, total)| *total)
.expect("failed to find guard and minute");
println!("part.two={}", *guard_id as u32 * *minute);
}

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[[package]]
name = "day-05"
version = "0.1.0"

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[package]
name = "day-05"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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dabAcCaCBAcCcaDA

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use std::collections::HashSet;
use std::io::{self, BufRead};
fn react<I>(polymer: I) -> String
where
I: Iterator<Item = char>,
{
let mut input = polymer.collect::<Vec<char>>();
loop {
let remove = input
.windows(2)
.enumerate()
.filter(|(_, chars)| {
assert!(chars.len() == 2);
let left = chars[0];
let right = if chars[1].is_uppercase() {
chars[1].to_ascii_lowercase()
} else {
chars[1].to_ascii_uppercase()
};
left == right
})
.map(|(i, _)| i)
.scan(None, |state, i| {
if let Some(n) = state {
let prev = *n + 1;
*n = i;
if prev != i {
Some(i)
} else {
None
}
} else {
*state = Some(i);
Some(i)
}
})
.collect::<Vec<_>>();
if remove.is_empty() {
break;
}
input = input
.into_iter()
.enumerate()
.filter(|(i, _)| !remove.contains(i) && !remove.contains(&(i - 1)))
.map(|(_, c)| c)
.collect::<Vec<_>>();
}
input.into_iter().collect::<String>()
}
fn main() {
let input = io::stdin()
.lock()
.lines()
.filter_map(Result::ok)
.collect::<String>();
println!("part.one={}", react(input.chars()).len());
let units = input
.chars()
.map(|c| c.to_ascii_lowercase())
.collect::<HashSet<_>>();
let min = units
.into_iter()
.map(|u| {
let stream = input
.chars()
.filter(|c| *c != u && *c != u.to_ascii_uppercase());
react(stream).len()
})
.min()
.expect("failed to find shortest polymer");
println!("part.two={}", min);
}

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[[package]]
name = "day-06"
version = "0.1.0"

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2018/06/Cargo.toml Normal file
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[package]
name = "day-06"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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1, 1
1, 6
8, 3
3, 4
5, 5
8, 9

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194, 200
299, 244
269, 329
292, 55
211, 63
123, 311
212, 90
292, 169
359, 177
354, 95
101, 47
95, 79
95, 287
294, 126
81, 267
330, 78
202, 165
225, 178
266, 272
351, 326
180, 62
102, 178
151, 101
343, 145
205, 312
74, 193
221, 56
89, 89
242, 172
59, 138
83, 179
223, 88
297, 234
147, 351
226, 320
358, 338
321, 172
54, 122
263, 165
126, 341
64, 132
264, 306
72, 202
98, 49
238, 67
310, 303
277, 281
222, 318
357, 169
123, 225

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use std::collections::HashMap;
use std::io::{self, BufRead};
fn distance(a: (i32, i32), b: (i32, i32)) -> i32 {
(a.0 - b.0).abs() + (a.1 - b.1).abs()
}
#[derive(Clone, Copy, Debug)]
enum State {
Empty,
Owner(usize, i32),
Equal(i32),
}
#[derive(Clone, Copy, Debug)]
enum Area {
Infinite,
Finite(usize),
}
fn main() {
let coordinates = io::stdin()
.lock()
.lines()
.filter_map(Result::ok)
.map(|line| {
let coords = line
.split(", ")
.map(|coord| coord.parse::<i32>().unwrap())
.collect::<Vec<_>>();
(coords[0], coords[1])
})
.collect::<Vec<_>>();
let width = coordinates
.iter()
.map(|(x, _)| *x as usize)
.max()
.expect("failed to find max x")
+ 1;
let height = coordinates
.iter()
.map(|(_, y)| *y as usize)
.max()
.expect("failed to find max y")
+ 1;
let mut grid_view = vec![State::Empty; width * height].into_boxed_slice();
for x in 0..width {
for y in 0..height {
for (i, c) in coordinates.iter().enumerate() {
let distance = distance(*c, (x as i32, y as i32));
let state = &mut grid_view[x + (y * width)];
*state = match state {
State::Empty => State::Owner(i, distance),
State::Owner(_, d) if *d > distance => State::Owner(i, distance),
State::Owner(o, d) if *d == distance && *o != i => State::Equal(distance),
State::Equal(d) if *d > distance => State::Owner(i, distance),
_ => *state,
};
}
}
}
let mut areas = HashMap::new();
for x in 0..width {
for y in 0..height {
if let State::Owner(o, _) = grid_view[x + (y * width)] {
let a = areas.entry(o).or_insert(Area::Finite(0));
if x == 0 || x == width - 1 || y == 0 || y == height - 1 {
*a = Area::Infinite;
} else {
match a {
Area::Infinite => (),
Area::Finite(area) => *area += 1,
}
}
}
}
}
let (_, area) = areas
.iter()
.filter_map(|(i, area)| {
if let Area::Finite(area) = area {
Some((i, area))
} else {
None
}
})
.max_by_key(|(_, area)| *area)
.expect("failed to find max area");
println!("part.one={}", area);
let mut grid_view = vec!['.'; width * height].into_boxed_slice();
for y in 0..height {
for x in 0..width {
let total = coordinates
.iter()
.map(|c| distance(*c, (x as i32, y as i32)))
.sum::<i32>();
if total < 10_000 {
grid_view[x + (y * width)] = '#';
}
}
}
let area = grid_view.iter().filter(|r| **r == '#').count();
println!("part.two={}", area);
}

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2018/07/Cargo.toml Normal file
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[package]
name = "day-07"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-08"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-09"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

3
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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-10"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

3
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fn main() {
println!("Hello, world!");
}

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2018/11/Cargo.toml Normal file
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[package]
name = "day-11"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

3
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fn main() {
println!("Hello, world!");
}

7
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[package]
name = "day-12"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-13"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-14"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-15"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-16"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-17"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-18"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-19"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-20"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-21"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-22"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-23"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-24"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

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fn main() {
println!("Hello, world!");
}

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[package]
name = "day-25"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
edition = "2018"
[dependencies]

3
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fn main() {
println!("Hello, world!");
}