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deleted file mode 100644
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deleted file mode 100644
index 433f2ea..0000000
--- a/day-9/Cargo.toml
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diff --git a/day-9/src/main.rs b/day-9/src/main.rs
deleted file mode 100644
index 3f8c51f..0000000
--- a/day-9/src/main.rs
+++ /dev/null
@@ -1,134 +0,0 @@
-use std::fs;
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-use itertools::{Itertools, MinMaxResult};
-
-fn main() -> Result<(), Box<dyn std::error::Error>> {
- let input = fs::read_to_string("input")?;
- let xmas = parse_xmas(&input)?;
-
- // Part 1
- let result = find_not_summed(&xmas, 25)?;
- println!("{}", result);
-
- // Part 2
- let result = find_weakness(&xmas, result)?;
- println!("{}", result);
-
- Ok(())
-}
-
-fn parse_xmas(input: &str) -> Result<Vec<u64>, ParseIntError> {
- input.lines().map(|line| line.parse()).collect()
-}
-
-fn find_weakness(xmas: &Vec<u64>, key: u64) -> Result<u64, &str> {
- // Now we use the key to find the weakness, by getting all
- // possible sub-sumbs of the list of numbers, and finding the one
- // that happens to match our key
- let weak_window = (2..xmas.len())
- .find_map(|window_size| {
- xmas.windows(window_size)
- .find(|window| window.iter().sum::<u64>() == key)
- })
- .ok_or("Could not find a weakness")?;
-
- if let MinMaxResult::MinMax(min, max) = weak_window.iter().minmax() {
- Ok(min + max)
- } else {
- unreachable!("We must have at least two elements due to the window size")
- }
-}
-
-fn find_not_summed(xmas: &Vec<u64>, window_size: usize) -> Result<u64, &str> {
- xmas.windows(window_size + 1)
- .find_map(|window| {
- if let [preamble @ .., number] = window {
- // If none of the number combinations in the preamble
- // sum to the final number, we've got the key!
- if !preamble
- .iter()
- .combinations(2)
- .any(|combination| combination.into_iter().sum::<u64>() == *number)
- {
- Some(*number)
- } else {
- None
- }
- } else {
- unreachable!("The windows must all have a length of at least 1");
- }
- })
- .ok_or("Could not find the entry")
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
- use indoc::indoc;
-
- #[test]
- fn test_simple() -> Result<(), Box<dyn std::error::Error>> {
- let input = indoc!(
- "35
- 20
- 15
- 25
- 47
- 40
- 62
- 55
- 65
- 95
- 102
- 117
- 150
- 182
- 127
- 219
- 299
- 277
- 309
- 576"
- );
-
- let xmas = parse_xmas(input)?;
- let result = find_not_summed(&xmas, 5)?;
-
- assert_eq!(result, 127);
- Ok(())
- }
-
- #[test]
- fn test_simple2() -> Result<(), Box<dyn std::error::Error>> {
- let input = indoc!(
- "35
- 20
- 15
- 25
- 47
- 40
- 62
- 55
- 65
- 95
- 102
- 117
- 150
- 182
- 127
- 219
- 299
- 277
- 309
- 576"
- );
-
- let xmas = parse_xmas(input)?;
- let key = find_not_summed(&xmas, 5)?;
- let result = find_weakness(&xmas, key)?;
-
- assert_eq!(result, 62);
- Ok(())
- }
-}
diff --git a/shell.nix b/shell.nix
index 9ce587d..232285d 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,9 +8,10 @@ with pkgs;
mkShell {
buildInputs = [
- rust-analyzer # the one from Mozilla is slightly broken https://github.com/mozilla/nixpkgs-mozilla/issues/238
- (pkgs.latest.rustChannels.stable.rust.override {
- # extensions = ["rust-src"]; # unneeded because we're using rust-analyzer from nixpkgs
- })
+ rustChannel.rust
];
+
+ shellHook = ''
+ export RUST_SRC_PATH="${rustChannel.rust-src}/lib/rustlib/src/rust/library"
+ '';
}