2018/04

2018-12-17 09:12:33 +01:00
parent 1fd77f3b83
commit e6cd5a020d
46 changed files with 1726 additions and 0 deletions
--- a/2018/04/Cargo.lock
+++ b/2018/04/Cargo.lock
@@ -0,0 +1,161 @@
+[[package]]
+name = "aho-corasick"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cfg-if"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "chrono"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "day-04"
+version = "0.1.0"
+dependencies = [
+ "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libc"
+version = "0.2.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "memchr"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "regex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "time"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ucd-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1e9a933f4e58658d7b12defcf96dc5c720f20832deebe3e0a19efd3b6aaeeb9e"
+"checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
+"checksum chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "45912881121cb26fad7c38c17ba7daa18764771836b34fab7d3fbd93ed633878"
+"checksum lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a374c89b9db55895453a74c1e38861d9deec0b01b405a82516e9d5de4820dea1"
+"checksum libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)" = "2d2857ec59fadc0773853c664d2d18e7198e83883e7060b63c924cb077bd5c74"
+"checksum memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "db4c41318937f6e76648f42826b1d9ade5c09cafb5aef7e351240a70f39206e9"
+"checksum num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "e83d528d2677f0518c570baf2b7abdcf0cd2d248860b68507bdcb3e91d4c0cea"
+"checksum num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0b3a5d7cc97d6d30d8b9bc8fa19bf45349ffe46241e8816f50f62f6d6aaabee1"
+"checksum redox_syscall 0.1.44 (registry+https://github.com/rust-lang/crates.io-index)" = "a84bcd297b87a545980a2d25a0beb72a1f490c31f0a9fde52fca35bfbb1ceb70"
+"checksum regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37e7cbbd370869ce2e8dff25c7018702d10b21a20ef7135316f8daecd6c25b7f"
+"checksum regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4e47a2ed29da7a9e1960e1639e7a982e6edc6d49be308a3b02daf511504a16d1"
+"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
+"checksum time 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "847da467bf0db05882a9e2375934a8a55cffdc9db0d128af1518200260ba1f6c"
+"checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
+"checksum utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "796f7e48bef87609f7ade7e06495a87d5cd06c7866e6a5cbfceffc558a243737"
+"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
+"checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
+"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
--- a/2018/04/Cargo.toml
+++ b/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"
--- a/2018/04/input.txt
+++ b/2018/04/input.txt
--- a/2018/04/src/main.rs
+++ b/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);
+}
--- a/2018/05/Cargo.toml
+++ b/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]
--- a/2018/05/src/main.rs
+++ b/2018/05/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/06/Cargo.toml
+++ b/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]
--- a/2018/06/src/main.rs
+++ b/2018/06/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/07/Cargo.toml
+++ b/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]
--- a/2018/07/src/main.rs
+++ b/2018/07/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/08/Cargo.toml
+++ b/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]
--- a/2018/08/src/main.rs
+++ b/2018/08/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/09/Cargo.toml
+++ b/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]
--- a/2018/09/src/main.rs
+++ b/2018/09/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/10/Cargo.toml
+++ b/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]
--- a/2018/10/src/main.rs
+++ b/2018/10/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/11/Cargo.toml
+++ b/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]
--- a/2018/11/src/main.rs
+++ b/2018/11/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/12/Cargo.toml
+++ b/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]
--- a/2018/12/src/main.rs
+++ b/2018/12/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/13/Cargo.toml
+++ b/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]
--- a/2018/13/src/main.rs
+++ b/2018/13/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/14/Cargo.toml
+++ b/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]
--- a/2018/14/src/main.rs
+++ b/2018/14/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/15/Cargo.toml
+++ b/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]
--- a/2018/15/src/main.rs
+++ b/2018/15/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/16/Cargo.toml
+++ b/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]
--- a/2018/16/src/main.rs
+++ b/2018/16/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/17/Cargo.toml
+++ b/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]
--- a/2018/17/src/main.rs
+++ b/2018/17/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/18/Cargo.toml
+++ b/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]
--- a/2018/18/src/main.rs
+++ b/2018/18/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/19/Cargo.toml
+++ b/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]
--- a/2018/19/src/main.rs
+++ b/2018/19/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/20/Cargo.toml
+++ b/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]
--- a/2018/20/src/main.rs
+++ b/2018/20/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/21/Cargo.toml
+++ b/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]
--- a/2018/21/src/main.rs
+++ b/2018/21/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/22/Cargo.toml
+++ b/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]
--- a/2018/22/src/main.rs
+++ b/2018/22/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/23/Cargo.toml
+++ b/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]
--- a/2018/23/src/main.rs
+++ b/2018/23/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/24/Cargo.toml
+++ b/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]
--- a/2018/24/src/main.rs
+++ b/2018/24/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
--- a/2018/25/Cargo.toml
+++ b/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]
--- a/2018/25/src/main.rs
+++ b/2018/25/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}