diff --git a/src/solutions/day_10.rs b/src/solutions/day_10.rs
index d1acc1a..a78b198 100644
--- a/src/solutions/day_10.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_11.rs b/src/solutions/day_11.rs
index 8b44a6c..3279298 100644
--- a/src/solutions/day_11.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_12.rs b/src/solutions/day_12.rs
index 872e4dd..f3dfebe 100644
--- a/src/solutions/day_12.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_13.rs b/src/solutions/day_13.rs
index 9f350d3..6bd954d 100644
--- a/src/solutions/day_13.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_14.rs b/src/solutions/day_14.rs
index 36c7134..0ed8566 100644
--- a/src/solutions/day_14.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_15.rs b/src/solutions/day_15.rs
index 487f2f6..bdfd526 100644
--- a/src/solutions/day_15.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_16.rs b/src/solutions/day_16.rs
index d3b8926..357e533 100644
--- a/src/solutions/day_16.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_17.rs b/src/solutions/day_17.rs
index ec16b6e..38ccb36 100644
--- a/src/solutions/day_17.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_18.rs b/src/solutions/day_18.rs
index a2a725f..b431c82 100644
--- a/src/solutions/day_18.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_19.rs b/src/solutions/day_19.rs
index 63edac4..33b9189 100644
--- a/src/solutions/day_19.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_20.rs b/src/solutions/day_20.rs
index f97104c..fec4471 100644
--- a/src/solutions/day_20.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_21.rs b/src/solutions/day_21.rs
index ac8b628..87c1b40 100644
--- a/src/solutions/day_21.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_22.rs b/src/solutions/day_22.rs
index c60c8ca..0bce5a1 100644
--- a/src/solutions/day_22.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_23.rs b/src/solutions/day_23.rs
index 168aebf..18fabfe 100644
--- a/src/solutions/day_23.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_24.rs b/src/solutions/day_24.rs
index ec40882..ecbeb0f 100644
--- a/src/solutions/day_24.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_25.rs b/src/solutions/day_25.rs
index 435ec37..22f2225 100644
--- a/src/solutions/day_25.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_4.rs b/src/solutions/day_4.rs
index 4aef4f2..141f205 100644
--- a/src/solutions/day_4.rs
+++ b/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,
diff --git a/src/solutions/day_7.rs b/src/solutions/day_7.rs
index 0d46306..dc523c1 100644
--- a/src/solutions/day_7.rs
+++ b/src/solutions/day_7.rs
@@ -1 +1,25 @@
+use std::{fs::read_to_string, path::Path};
+
+use super::AocSolution;
+use crate::utils::Result;
+
 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_day_7.txt")?,
+        })
+    }
+
+    fn part_one(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+
+    fn part_two(&self, input: &str) -> Result<Self::Output> {
+        todo!()
+    }
+}
diff --git a/src/solutions/day_8.rs b/src/solutions/day_8.rs
index a6a1c83..1ea9f0a 100644
--- a/src/solutions/day_8.rs
+++ b/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!()
+    }
+}
diff --git a/src/solutions/day_9.rs b/src/solutions/day_9.rs
index 526ebc6..7980846 100644
--- a/src/solutions/day_9.rs
+++ b/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!()
+    }
+}
diff --git a/src/utils/coord.rs b/src/utils/coord.rs
index 06cf0ec..fe2f850 100644
--- a/src/utils/coord.rs
+++ b/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 }
     }
 }