day 7

src/main.rs

@@ -28,6 +28,7 @@ fn main() -> Result<()> {
         4 => AocDayFourSolution,
         5 => AocDayFiveSolution,
         6 => AocDaySixSolution,
+        7 => AocDaySevenSolution,
     };
 
     Ok(())

src/solutions/day_10.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTenSolution;
+
+impl AocSolution for AocDayTenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_10.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_11.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayElevenSolution;
+
+impl AocSolution for AocDayElevenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_11.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_12.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwelveSolution;
+
+impl AocSolution for AocDayTwelveSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_12.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_13.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayThirteenSolution;
+
+impl AocSolution for AocDayThirteenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_13.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_14.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayFourteenSolution;
+
+impl AocSolution for AocDayFourteenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_14.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_15.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayFifteenSolution;
+
+impl AocSolution for AocDayFifteenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_15.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_16.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDaySixteenSolution;
+
+impl AocSolution for AocDaySixteenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_16.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_17.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDaySeventeenSolution;
+
+impl AocSolution for AocDaySeventeenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_17.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_18.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayEighteenSolution;
+
+impl AocSolution for AocDayEighteenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_18.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_19.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayNineteenSolution;
+
+impl AocSolution for AocDayNineteenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_19.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_20.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwentySolution;
+
+impl AocSolution for AocDayTwentySolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_20.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_21.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwentyOneSolution;
+
+impl AocSolution for AocDayTwentyOneSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_21.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_22.rs

@@ -1 +1,26 @@
+
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwentyTwoSolution;
+
+impl AocSolution for AocDayTwentyTwoSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_22.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_23.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwentyThreeSolution;
+
+impl AocSolution for AocDayTwentyThreeSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_23.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_24.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwentyFourSolution;
+
+impl AocSolution for AocDayTwentyFourSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_24.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_25.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayTwentyFiveSolution;
+
+impl AocSolution for AocDayTwentyFiveSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_25.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_4.rs

@@ -1,21 +1,21 @@
 use std::{collections::HashMap, fs::read_to_string, path::Path};
 
 use super::AocSolution;
-use crate::utils::Result;
+use crate::utils::{coord::Coord, Result};
 
-const DIRS: [(i16, i16); 8] = [
-    (1, 0),
-    (1, -1),
-    (0, -1),
-    (-1, -1),
-    (-1, 0),
-    (-1, 1),
-    (0, 1),
-    (1, 1),
+const DIRS: [Coord; 8] = [
+    Coord::new(1, 0),
+    Coord::new(1, -1),
+    Coord::new(0, -1),
+    Coord::new(-1, -1),
+    Coord::new(-1, 0),
+    Coord::new(-1, 1),
+    Coord::new(0, 1),
+    Coord::new(1, 1),
 ];
 
 struct XmasGrid {
-    pub grid: HashMap<(i16, i16), char>,
+    pub grid: HashMap<Coord, char>,
 }
 
 impl XmasGrid {
@@ -24,22 +24,20 @@ impl XmasGrid {
             grid: src
                 .lines()
                 .zip(0..)
-                .flat_map(|(l, y)| l.chars().zip(0..).map(move |(c, x)| ((x, y), c)))
+                .flat_map(|(l, y)| l.chars().zip(0..).map(move |(c, x)| (Coord::new(x, y), c)))
                 .collect(),
         }
     }
 
-    fn find_xmas(&self, pos: (i16, i16)) -> usize {
+    fn find_xmas(&self, pos: Coord) -> usize {
         let mut tmp = 0;
-        for (dx, dy) in DIRS {
+        for dir in DIRS {
             let mut found = true;
-            let (mut x, mut y) = pos;
 
             for nxt in ['M', 'A', 'S'] {
-                x += dx;
-                y += dy;
+                let nxt_pos = pos + dir;
 
-                if self.grid.get(&(x, y)) != Some(&nxt) {
+                if self.grid.get(&nxt_pos) != Some(&nxt) {
                     found = false;
                     break;
                 }
@@ -53,13 +51,13 @@ impl XmasGrid {
         tmp
     }
 
-    fn find_x_mas(&self, pos: (i16, i16)) -> usize {
-        let (x, y) = pos;
+    fn find_x_mas(&self, pos: Coord) -> usize {
+        let (x, y) = (pos.x, pos.y);
 
-        let tr = self.grid.get(&(x + 1, y + 1));
-        let br = self.grid.get(&(x + 1, y - 1));
-        let bl = self.grid.get(&(x - 1, y - 1));
-        let tl = self.grid.get(&(x - 1, y + 1));
+        let tr = self.grid.get(&Coord::new(x + 1, y + 1));
+        let br = self.grid.get(&Coord::new(x + 1, y - 1));
+        let bl = self.grid.get(&Coord::new(x - 1, y - 1));
+        let tl = self.grid.get(&Coord::new(x - 1, y + 1));
 
         match (tr, bl, tl, br) {
             (Some('S'), Some('M'), Some('M'), Some('S')) => 1,

src/solutions/day_7.rs

@@ -1 +1,177 @@
+use std::{fs::read_to_string, ops::Mul, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
+fn compute(nums: &[u64], total: u64) -> bool {
+    let mut equations = vec![false; nums.len() - 1];
+
+    fn _inc_xf(flags: &mut [bool]) {
+        let mut carry = true;
+        for flag in flags.iter_mut().rev() {
+            if !carry {
+                break;
+            }
+
+            let tmp = *flag;
+            *flag = !tmp;
+            carry = tmp;
+        }
+    }
+
+    loop {
+        if equations.iter().zip(1..).fold(
+            nums[0],
+            |n, (&x, idx)| {
+                if x {
+                    n * nums[idx]
+                } else {
+                    n + nums[idx]
+                }
+            },
+        ) == total
+        {
+            return true;
+        } else {
+            if equations.iter().all(|b| *b) {
+                break;
+            }
+            _inc_xf(&mut equations);
+        }
+    }
+
+    false
+}
+
+fn concat(n1: u64, n2: u64) -> u64 {
+    format!("{n1}{n2}").parse().unwrap()
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum Operation {
+    Add,
+    Mul,
+    Concat,
+}
+
+impl Operation {
+    fn inc(self) -> Self {
+        match self {
+            Self::Add => Self::Mul,
+            Self::Mul => Self::Concat,
+            Self::Concat => Self::Add,
+        }
+    }
+}
+
+fn compute_ver_two(nums: &[u64], total: u64) -> bool {
+    let mut equations = vec![Operation::Add; nums.len() - 1];
+
+    fn _inc_xf(flags: &mut [Operation]) {
+        let mut carry = true;
+        for flag in flags.iter_mut().rev() {
+            if !carry {
+                break;
+            }
+
+            let tmp = *flag;
+            *flag = tmp.inc();
+            carry = tmp == Operation::Concat;
+        }
+    }
+
+    loop {
+        if equations
+            .iter()
+            .zip(1..)
+            .fold(nums[0], |n, (&x, idx)| match x {
+                Operation::Add => n + nums[idx],
+                Operation::Mul => n * nums[idx],
+                Operation::Concat => concat(n, nums[idx]),
+            })
+            == total
+        {
+            return true;
+        } else {
+            if equations.iter().all(|b| *b == Operation::Concat) {
+                break;
+            }
+            _inc_xf(&mut equations);
+        }
+    }
+
+    false
+}
+
+#[derive(Clone, Copy)]
 pub struct AocDaySevenSolution;
+
+impl AocSolution for AocDaySevenSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_7.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        let mut sum = 0;
+        for line in input.lines() {
+            if let Some((total, nums)) = line.split_once(':') {
+                let total = total.parse::<u64>()?;
+                let nums = nums
+                    .split_whitespace()
+                    .map(|n| n.parse::<u64>().map_err(|e| e.into()))
+                    .collect::<Result<Vec<u64>>>()?;
+
+                if compute(&nums, total) {
+                    sum += total;
+                }
+            }
+        }
+
+        Ok(sum)
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        let mut sum = 0;
+        for line in input.lines() {
+            if let Some((total, nums)) = line.split_once(':') {
+                let total = total.parse::<u64>()?;
+                let nums = nums
+                    .split_whitespace()
+                    .map(|n| n.parse::<u64>().map_err(|e| e.into()))
+                    .collect::<Result<Vec<u64>>>()?;
+
+                if compute_ver_two(&nums, total) {
+                    sum += total;
+                }
+            }
+        }
+
+        Ok(sum)
+    }
+}
+
+#[test]
+fn test() {
+    let sol = AocDaySevenSolution;
+
+    assert_eq!(
+        sol.part_one(
+            r#"190: 10 19
+3267: 81 40 27
+83: 17 5
+156: 15 6
+7290: 6 8 6 15
+161011: 16 10 13
+192: 17 8 14
+21037: 9 7 18 13
+292: 11 6 16 20"#
+        )
+        .unwrap(),
+        3749
+    );
+}

src/solutions/day_8.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayEightSolution;
+
+impl AocSolution for AocDayEightSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_8.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/solutions/day_9.rs

@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 pub struct AocDayNineSolution;
+
+impl AocSolution for AocDayNineSolution {
+    type Output = u64;
+
+    fn get_input(&self, path: Option<&Path>) -> Result<String> {
+        Ok(match path {
+            Some(p) => read_to_string(p)?,
+            None => read_to_string("./input/day_day_9.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}

src/utils/coord.rs

@@ -9,7 +9,7 @@ pub struct Coord {
 }
 
 impl Coord {
-    pub fn new(x: i16, y: i16) -> Self {
+    pub const fn new(x: i16, y: i16) -> Self {
         Self { x, y }
     }
 }

src/utils/mod.rs

@@ -8,6 +8,8 @@ pub type Result<T> = std::result::Result<T, Error>;
 
 #[derive(thiserror::Error, Debug)]
 pub enum Error {
+    #[error("Error parsing integer: {0}")]
+    ParseNumErr(#[from] std::num::ParseIntError),
     #[error("IO error: {0}")]
     Io(#[from] std::io::Error),
     #[error("Invalid command usage: {0}")]