diff --git a/day-15/Cargo.lock b/day-15/Cargo.lock
deleted file mode 100644
index 1135a55..0000000
--- a/day-15/Cargo.lock
+++ /dev/null
@@ -1,78 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "day-15"
-version = "0.1.0"
-dependencies = [
- "indoc",
-]
-
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diff --git a/day-15/Cargo.toml b/day-15/Cargo.toml
deleted file mode 100644
index 5d876d5..0000000
--- a/day-15/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]
-name = "day-15"
-version = "0.1.0"
-authors = ["Tristan Daniël Maat <tm@tlater.net>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-indoc = "0.3"
diff --git a/day-15/src/main.rs b/day-15/src/main.rs
deleted file mode 100644
index 8aa0f24..0000000
--- a/day-15/src/main.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-use std::collections::HashMap;
-
-fn main() -> Result<(), Box<dyn std::error::Error>> {
- // Part 1
- let numbers = parse_numbers("1,20,11,6,12,0")?;
- let result = play(&numbers, 2020);
- println!("{}", result);
-
- // Part 2
- let numbers = parse_numbers("1,20,11,6,12,0")?;
- let result = play(&numbers, 30000000);
- println!("{}", result);
-
- Ok(())
-}
-
-fn parse_numbers(input: &str) -> Result<Vec<u32>, std::num::ParseIntError> {
- input.split(',').map(|number| number.parse()).collect()
-}
-
-fn play(numbers: &Vec<u32>, turns: usize) -> u32 {
- let mut said = HashMap::new();
- for (turn, number) in numbers.iter().enumerate() {
- said.insert(*number, (turn + 1, 0));
- }
- let mut last = *numbers.last().expect("Must have at least one number");
-
- for turn in numbers.len()..turns {
- match said.get(&last) {
- Some((_, 0)) | None => {
- last = 0;
-
- let entry = said.entry(last).or_insert((0, 0));
- *entry = (turn + 1, entry.0);
- }
- Some((last_turn, last_last_turn)) => {
- last = (last_turn - last_last_turn) as u32;
-
- let entry = said.entry(last).or_insert((0, 0));
- *entry = (turn + 1, entry.0);
- }
- };
- }
-
- last
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn test_simple() -> Result<(), Box<dyn std::error::Error>> {
- let input = "0,3,6";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 436);
- Ok(())
- }
-
- #[test]
- fn test_simple0() -> Result<(), Box<dyn std::error::Error>> {
- let input = "1,3,2";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 1);
- Ok(())
- }
-
- #[test]
- fn test_simple1() -> Result<(), Box<dyn std::error::Error>> {
- let input = "2,1,3";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 10);
- Ok(())
- }
-
- #[test]
- fn test_simple2() -> Result<(), Box<dyn std::error::Error>> {
- let input = "1,2,3";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 27);
- Ok(())
- }
-
- #[test]
- fn test_simple3() -> Result<(), Box<dyn std::error::Error>> {
- let input = "2,3,1";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 78);
- Ok(())
- }
-
- #[test]
- fn test_simple4() -> Result<(), Box<dyn std::error::Error>> {
- let input = "3,2,1";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 438);
- Ok(())
- }
-
- #[test]
- fn test_simple5() -> Result<(), Box<dyn std::error::Error>> {
- let input = "3,1,2";
- let numbers = parse_numbers(input)?;
- let result = play(&numbers, 2020);
-
- assert_eq!(result, 1836);
- Ok(())
- }
-}