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

2018/04/Cargo.lock

@@ -0,0 +1,161 @@
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2018/04/Cargo.toml

@@ -0,0 +1,9 @@
+[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"

2018/04/src/main.rs

@@ -0,0 +1,176 @@
+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);
+}

2018/05/Cargo.lock

@@ -0,0 +1,4 @@
+[[package]]
+name = "day-05"
+version = "0.1.0"
+

2018/05/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-05"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/05/example-01.txt

@@ -0,0 +1 @@
+dabAcCaCBAcCcaDA

2018/05/src/main.rs

@@ -0,0 +1,88 @@
+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);
+}

2018/06/Cargo.lock

@@ -0,0 +1,4 @@
+[[package]]
+name = "day-06"
+version = "0.1.0"
+

2018/06/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-06"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/06/example-01.txt

@@ -0,0 +1,6 @@
+1, 1
+1, 6
+8, 3
+3, 4
+5, 5
+8, 9

2018/06/input.txt

@@ -0,0 +1,50 @@
+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

2018/06/src/main.rs

@@ -0,0 +1,120 @@
+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);
+}

2018/07/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-07"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/07/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/08/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-08"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/08/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/09/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-09"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/09/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/10/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-10"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/10/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/11/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-11"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/11/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/12/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-12"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/12/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/13/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-13"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/13/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/14/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-14"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/14/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/15/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-15"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/15/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/16/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-16"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/16/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/17/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-17"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/17/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/18/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-18"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/18/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/19/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-19"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/19/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/20/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-20"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/20/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/21/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-21"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/21/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/22/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-22"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/22/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/23/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-23"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/23/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/24/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-24"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/24/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

2018/25/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day-25"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+[dependencies]

2018/25/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}