src/days.rs

@@ -1,7 +1,7 @@
 pub mod d1;
 pub mod d2;
 pub mod d3;
-pub mod d4;
+// pub mod d4;
 // pub mod d5;
 // pub mod d6;
 // pub mod d7;

src/days/d4.rs

@@ -1,86 +0,0 @@
-use crate::prelude::*;
-
-pub type T = (String, M<char, usize>, Vec<char>, u32);
-pub type I = Vec<T>;
-pub type O = u32;
-
-fn _parse (data: &str) -> I {
-    data.lines().map(|line| {
-        let mut parts = line.split('-').collect_vec();
-        let last = parts.pop().unwrap();
-        let rest = parts.join(" ");
-        let m = parts.into_iter().map(|p| p.chars()).flatten().counts();
-
-        let (number, checksum) = last.split_once('[').unwrap();
-
-        let number = number.parse().unwrap();
-        let checksum = checksum.trim_matches(']').chars().collect();
-
-        (rest, m, checksum, number)
-    }).collect()
-}
-
-fn _solve <'a> (data: &'a I) -> impl Iterator<Item = (&'a String, &'a u32)> {
-    data.into_iter().filter_map(|(st, m, checksum, num)| {
-        let mut m = m.into_iter().collect_vec();
-
-        m.sort_by(|a, b| match b.1.cmp(&a.1) {
-            Or::Equal => a.0.cmp(&b.0),
-            e => e
-        });
-
-        if checksum.into_iter().zip(m.into_iter()).all(|(&l, (&r, _))| l == r) {
-            Some((st, num))
-        } else {
-            None
-        }
-    })
-}
-
-fn _silver (data: &I) -> O {
-    _solve(data).map(|(_, num)| num).sum()
-}
-
-fn _gold (data: &I) -> O {
-    *_solve(data).find(|(s, num)| {
-
-        let mut s = s.chars().collect_vec();
-
-        for c in s.iter_mut() {
-            match *c {
-                ' ' => (),
-                a => {
-                    *c = ((((a as u8 - b'a') as u32 + *num) % 26) + b'a' as u32) as u8 as char;
-                }
-            }
-        }
-        let s = s.into_iter().collect::<String>();
-        s.contains("north")
-    }).unwrap().1
-}
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    fn read () -> I {
-        let data = inc!(4);
-        _parse(data)
-    }
-
-    #[test]
-    fn silver () {
-        let data = read();
-        let ans = _silver(&data);
-
-        assert_eq!(ans, 278221)
-    }
-
-    #[test]
-    fn gold () {
-        let data = read();
-        let ans = _gold(&data);
-
-        assert_eq!(ans, 267)
-    }
-}

src/prelude.rs

@@ -1,7 +1,4 @@
 pub use crate::utils::*;
 pub use anyhow::Error;
 pub use itertools::Itertools;
-pub use std::{
+pub use std::collections::{ HashMap as M, HashSet as S };
-    collections::{ HashMap as M, HashSet as S },
-    cmp::Ordering as Or,
-};