From 6397ed00920d097e521ef0d6454553ac42a3699e Mon Sep 17 00:00:00 2001
From: Dennis Brentjes <d.brentjes@gmail.com>
Date: Mon, 2 Dec 2024 22:09:19 +0100
Subject: [PATCH] Adds Day2

---
 resources/input2.txt | 1000 ++++++++++++++++++++++++++++++++++++++++++
 src/days/day1.rs     |   90 +++-
 src/days/day2.rs     |  113 +++++
 src/days/mod.rs      |   16 +-
 src/input/mod.rs     |    2 +-
 src/main.rs          |    8 +-
 6 files changed, 1199 insertions(+), 30 deletions(-)
 create mode 100644 resources/input2.txt
 create mode 100644 src/days/day2.rs

diff --git a/resources/input2.txt b/resources/input2.txt
new file mode 100644
index 0000000..ed8f49c
--- /dev/null
+++ b/resources/input2.txt
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+91 90 87 84 81 79 77 74
+64 67 69 70 72 73
+37 40 42 43 45
+48 51 54 55 58 61
+46 49 51 53 54
+43 46 49 50 53
+51 54 56 59 61
+57 60 62 63 64 66 67 69
+44 42 41 40 38
+53 51 48 47 45 42 40 38
+72 73 74 76 79 81
+25 22 19 17 15 13 10
+22 19 18 17 15 14 12
+37 35 34 32 31
+76 74 72 70 67 64 61 59
+60 61 64 66 68 70
+8 10 12 13 16
+99 97 95 92 89 86 84
+87 84 83 82 80 79
+80 78 75 74 72 70 68
+86 84 81 79 78 77 74 73
+87 88 89 91 92 94 97
+39 36 35 33 31
+52 49 47 45 44 43
+45 42 40 39 37 34
+68 70 72 74 77
+87 89 90 91 94
+61 58 56 53 51 48 45 43
+75 78 81 84 87 90
+44 47 50 52 54 57
+82 85 88 91 93 94
+3 5 8 11 14 17 18 19
+53 50 49 46 43
+87 85 82 80 77 75 72 71
+70 67 65 64 63 60 59
+28 29 31 33 36 38
+76 77 78 80 83 86 87 89
+41 42 45 46 48 51
+47 46 43 42 40 37 36
+86 85 82 80 79 78 77 75
+32 29 28 27 24 21
+3 5 8 9 10 12
+11 14 15 18 20 21
+28 31 34 36 39
+25 24 22 21 20 17
+67 68 69 71 73 75 77
+48 46 43 42 39 38 37
+23 26 27 30 33 36
+68 70 73 74 75 76 77
+83 85 88 91 93 96
+55 54 51 50 48
+46 48 49 51 52 55 58 59
+35 37 40 41 44
+61 64 65 66 67 68 70 73
+3 4 7 10 11 13 16
+99 97 94 93 91 90
+45 42 40 37 34
+26 27 30 32 33 36 37
+34 32 31 28 25 22
+91 92 94 97 98 99
+55 58 60 63 64 66 67 70
+15 17 18 21 22
+58 60 63 64 65 66
+28 31 34 35 37 40 42
+63 66 69 70 71 72 75
+51 53 54 55 57 58 59
+79 82 85 88 91 93 94
+20 22 24 27 28
+67 66 63 61 60 58 55
+46 43 41 40 37 34 31 30
+38 35 33 32 29 28 26 23
+58 56 55 54 53 50
+83 86 89 92 95 96
+12 14 16 17 18 20 21
+68 65 63 62 60 59 57 54
+90 88 85 84 82 81 80 79
+59 56 53 52 50 48 47
+27 28 31 32 35 36 37
+81 79 77 74 73 70
+56 55 54 53 52 50 49
+40 41 44 46 49
+71 74 77 80 82 84 85 86
+40 43 46 49 50
+69 67 66 63 60 59
+35 36 38 40 42 43 45
+20 18 17 15 13 11 10 7
+32 29 27 24 23 22 20 18
+77 78 80 81 82
+25 23 21 19 16 15
+85 86 87 88 90
+18 20 21 24 26 27 30
+1 4 5 7 10
+81 82 85 87 90 93 96 98
+27 24 21 18 15
+82 85 87 89 92 94 96 99
+49 51 52 53 56 59 60
+80 79 76 73 71 69 66
+66 63 62 59 56
+65 64 61 58 56 55 52
+45 48 49 52 54 55 58
+82 81 78 77 75 73 71 70
+66 64 63 60 58 57 55
+62 59 56 54 51 49 46
+7 6 5 4 2
+32 31 28 25 22 19 18
+78 80 83 84 85 88 89
+56 57 59 61 63
+53 50 48 47 46 45 44 42
+83 82 81 80 78
+28 31 32 35 37 38 40
+4 5 7 9 10 12 15
+44 47 48 50 53 54
+51 53 54 56 57 60
+2 5 7 10 13 15 17 20
+24 25 26 28 31 33
+24 27 29 32 35 37
+87 88 90 92 95 98
+47 49 50 53 55 57 60
+87 85 83 82 81 80 78
+3 5 8 10 12 14 16 17
+27 29 31 34 35 36 37 39
+10 12 15 16 18 20 21
+36 37 39 42 43 44
+75 76 77 80 82 83
+76 77 78 80 81 84 85 86
+23 21 20 17 15 12 10 8
+86 83 80 78 77 74 72
+82 80 79 76 73 72
+62 65 66 67 70
+94 92 90 88 85 83 81 80
+47 45 43 42 40 37 36
+32 35 37 40 41 42 43
+77 78 81 83 85 86 89 90
+20 19 18 16 13
+37 40 42 45 46 49
+31 32 35 36 38 39
+62 64 66 68 69 70 71 73
+83 84 87 90 91
+4 5 7 9 12 13 16
+59 60 61 64 65 68
+61 59 56 54 52 49 48 45
+26 25 23 22 19 16
+69 72 74 76 77
+75 78 79 82 83 85 86
+67 68 69 70 72 74 75 78
+68 65 62 61 59
+20 21 22 23 24 25 27 29
+30 28 26 25 23 21
+72 70 68 65 62 59 56
+69 70 72 75 78 79
+12 14 17 18 20 21 22
+13 16 18 20 21 22 24 27
+82 83 86 87 89 90 93
+45 48 51 54 55 58
+77 78 81 82 85 88 90 93
+87 88 89 91 94 97
+44 42 41 38 35 33
+39 36 34 32 31
+37 39 41 42 45 48 51 54
+72 75 78 79 81
+64 67 70 71 73 76
+60 57 55 54 51 48 46
+29 28 26 23 21 18 15
+16 15 12 9 8
+71 70 67 64 62 61
+6 8 9 10 12 13 16 19
+42 40 38 35 34 33
+80 82 83 85 87
+41 38 37 35 34 33 30
+54 57 59 61 64 65 67
\ No newline at end of file
diff --git a/src/days/day1.rs b/src/days/day1.rs
index 1f0bcd5..1b7738c 100644
--- a/src/days/day1.rs
+++ b/src/days/day1.rs
@@ -1,31 +1,60 @@
 use std::{collections::HashMap, iter::zip, path::Path};
 
-use crate::{days::AdventDay, error::AdventError, input::get_lines};
+use crate::{error::AdventError, input::get_lines};
 
-pub struct Day1 {
+use super::*;
+
+pub struct Day1Part1 {
     list1: Vec<i32>,
     list2: Vec<i32>,
+}
+
+pub struct Day1Part2 {
     count1: HashMap<i32, u64>,
     count2: HashMap<i32, u64>
 }
 
+pub struct Day1 {
+    part1: Day1Part1,
+    part2: Day1Part2
+}
+
+impl Day1 {
+    pub fn new() -> Self {
+        Day1 {
+            part1: Day1Part1::new(),
+            part2: Day1Part2::new()
+        }
+    }
+}
 
 impl AdventDay for Day1 {
+    fn puzzle1(&mut self) -> Result<u64, AdventError> {
+        self.part1.read_input()?;
+        self.part1.solve()
+    }
+    
+    fn puzzle2(&mut self) -> Result<u64, AdventError> {
+        self.part2.read_input()?;
+        self.part2.solve()
+    }
+}
+
+impl Day1Part2 {
     fn new() -> Self {
-        Day1 {
-            list1: vec![],
-            list2: vec![],
+        Day1Part2 {
             count1: HashMap::new(),
             count2: HashMap::new()
         }
     }
+}
 
+impl AdventDayPart2 for Day1Part2 {
     fn read_input(&mut self) -> Result<(),AdventError> {
         for line in get_lines(Path::new("resources/input1.txt")) {
             let line = line?;
-            let mut s = line.split("   ");
+            let mut s = line.split_whitespace();
             let l = s.next().unwrap().parse::<i32>()?;
-            self.list1.push(l);
             if self.count1.contains_key(&l) {
                 *self.count1.get_mut(&l).unwrap() += 1;
             }
@@ -33,7 +62,6 @@ impl AdventDay for Day1 {
                 self.count1.insert(l, 1);
             }
             let r = s.next().unwrap().parse::<i32>()?;
-            self.list2.push(r);
             if self.count2.contains_key(&r) {
                 *self.count2.get_mut(&r).unwrap() += 1;
             }
@@ -44,19 +72,7 @@ impl AdventDay for Day1 {
         Ok(())
     }
     
-    fn puzzle1(&mut self) -> Result<u64, AdventError> {
-        
-        self.list1.sort();
-        self.list2.sort();
-
-        Ok(zip(self.list1.clone(), self.list2.clone())
-        .map(|(l, r)| {
-            (l - r).abs() as u64
-        })
-        .sum::<u64>())
-    }
-    
-    fn puzzle2(&mut self) -> Result<u64, AdventError> {
+    fn solve(&mut self) -> Result<u64, AdventError> {
         Ok(self.count1.keys().into_iter().map(
             |k| {
             let s = *k as u64;
@@ -68,4 +84,36 @@ impl AdventDay for Day1 {
             }
     }).sum())
     }
+}
+
+impl Day1Part1 {
+    fn new() -> Self {
+        Day1Part1 {
+            list1: vec![],
+            list2: vec![],
+        }
+    }
+}
+
+impl AdventDayPart1 for Day1Part1 {
+    fn read_input(&mut self) -> Result<(),AdventError> {
+        for line in get_lines(Path::new("resources/input1.txt")) {
+            let line = line?;
+            let mut s = line.split_whitespace();
+            self.list1.push(s.next().unwrap().parse::<i32>()?);
+            self.list2.push(s.next().unwrap().parse::<i32>()?);
+        }
+        Ok(())
+    }
+    
+    fn solve(&mut self) -> Result<u64, AdventError> {
+        self.list1.sort();
+        self.list2.sort();
+
+        Ok(zip(self.list1.clone(), self.list2.clone())
+        .map(|(l, r)| {
+            (l - r).abs() as u64
+        })
+        .sum::<u64>())
+    }
 }
\ No newline at end of file
diff --git a/src/days/day2.rs b/src/days/day2.rs
new file mode 100644
index 0000000..abfc897
--- /dev/null
+++ b/src/days/day2.rs
@@ -0,0 +1,113 @@
+use std::{path::Path, str::FromStr};
+
+use crate::input::read_into_vec;
+
+use super::*;
+
+struct Report(Vec<i32>);
+
+impl FromStr for Report {
+    type Err = AdventError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(Report(s.split_whitespace()
+            .map(|s| -> Result<i32, AdventError> { Ok(s.parse::<i32>()?)})
+            .collect::<Result<Vec<i32>, AdventError>>()?
+            ))
+    }
+}
+
+impl Report {
+    fn safe1(&self) -> bool {
+        let diff_vec: Vec<i32> = self.0.iter().zip(self.0.iter().skip(1)).map(|(l, r)| l - r).collect();
+        diff_vec.iter().all(|x| {*x >= -3 && *x <= -1}) || diff_vec.iter().all(|x| *x >= 1 && *x <= 3) 
+    }
+
+    fn safe2(&self) -> bool {
+        let diff_vec: Vec<i32> = self.0.iter().zip(self.0.iter().skip(1)).map(|(l, r)| l - r).collect();
+        if diff_vec.iter().all(|x| {*x >= -3 && *x <= -1}) || diff_vec.iter().all(|x| *x >= 1 && *x <= 3) {
+            return true;
+        }
+
+        for i in 0..(self.0.len()) {
+            let mut new_vec = self.0.clone();
+            new_vec.remove(i);
+            let new_diff_vec : Vec<i32> = new_vec.iter().zip(new_vec.iter().skip(1)).map(|(l, r)| l - r).collect();
+            println!("{:?}", new_vec);
+            if new_diff_vec.iter().all(|x| {*x >= -3 && *x <= -1}) || new_diff_vec.iter().all(|x| *x >= 1 && *x <= 3) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
+
+struct Day2Part1 {
+    reports: Vec<Report>
+}
+
+struct Day2Part2 {
+    reports: Vec<Report>
+}
+
+pub struct Day2 {
+    part1: Day2Part1,
+    part2: Day2Part2
+}
+
+impl Day2 {
+    pub fn new() -> Self {
+        Day2 {
+            part1: Day2Part1::new(),
+            part2: Day2Part2::new()
+        }
+    }
+}
+
+impl AdventDay for Day2 {
+    fn puzzle1(&mut self) -> Result<u64, AdventError> {
+        self.part1.read_input()?;
+        self.part1.solve()
+    }
+
+    fn puzzle2(&mut self) -> Result<u64, AdventError> {
+        self.part2.read_input()?;
+        self.part2.solve()
+    }
+}
+
+impl Day2Part1 {
+    fn new() -> Self {
+        Day2Part1 {
+            reports: vec!()
+        }
+    }
+}
+
+impl AdventDayPart1 for Day2Part1 {
+    fn read_input(&mut self) -> Result<(),AdventError> {
+        Ok(self.reports = read_into_vec::<Report>(Path::new("resources/input2.txt"))?)
+    }
+
+    fn solve(&mut self) -> Result<u64, AdventError> {
+        Ok(self.reports.iter().filter(|x| x.safe1()).count().try_into().unwrap())
+    }
+}
+
+impl Day2Part2 {
+    fn new() -> Self {
+        Day2Part2 {
+            reports: vec!()
+        }
+    }
+}
+
+impl AdventDayPart2 for Day2Part2 {
+    fn read_input(&mut self) -> Result<(),AdventError> {
+        Ok(self.reports = read_into_vec::<Report>(Path::new("resources/input2.txt"))?)
+    }
+
+    fn solve(&mut self) -> Result<u64, AdventError> {
+        Ok(self.reports.iter().filter(|x| x.safe2()).count().try_into().unwrap())
+    }
+}
diff --git a/src/days/mod.rs b/src/days/mod.rs
index 80b3594..803a592 100644
--- a/src/days/mod.rs
+++ b/src/days/mod.rs
@@ -1,11 +1,19 @@
 use crate::error::AdventError;
 
-pub trait AdventDay {
-    fn new() -> Self;
-
+pub trait AdventDayPart1 {
     fn read_input(&mut self) -> Result<(),AdventError>;
+    fn solve(&mut self) -> Result<u64, AdventError>;
+}
+
+pub trait AdventDayPart2 {
+    fn read_input(&mut self) -> Result<(),AdventError>;
+    fn solve(&mut self) -> Result<u64, AdventError>;
+}
+
+pub trait AdventDay {
     fn puzzle1(&mut self) -> Result<u64, AdventError>;
     fn puzzle2(&mut self) -> Result<u64, AdventError>;
 }
 
-pub mod day1;
\ No newline at end of file
+pub mod day1;
+pub mod day2;
\ No newline at end of file
diff --git a/src/input/mod.rs b/src/input/mod.rs
index cc07f3a..56dc970 100644
--- a/src/input/mod.rs
+++ b/src/input/mod.rs
@@ -2,7 +2,7 @@ use std::{fs::File, io::{BufRead, BufReader, Lines, Read}, path::{Path, PathBuf}
 
 use crate::error::AdventError;
 
-pub fn _read_into_vec<T:FromStr>(file_path : &Path) -> Result<Vec<T>, AdventError> where AdventError: From<<T as FromStr>::Err> {
+pub fn read_into_vec<T:FromStr>(file_path : &Path) -> Result<Vec<T>, AdventError> where AdventError: From<<T as FromStr>::Err> {
     let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     path.push(file_path);
     let file = File::open(path).expect("no such file");
diff --git a/src/main.rs b/src/main.rs
index a11ef11..7c3bce4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,19 +6,20 @@ mod input;
 use std::env;
 
 use day1::Day1;
+use day2::Day2;
 
 use crate::error::AdventError;
 use crate::days::*;
 
 fn main() -> Result<(), AdventError> {
 
-    let mut advent_days = vec!(
-        Day1::new()
+    let mut advent_days: Vec<Box::<dyn AdventDay>> = vec!(
+        Box::new(Day1::new()),
+        Box::new(Day2::new())
     );
 
     if env::args().len() == 1 {
         Ok(advent_days.into_iter().map(|mut day| {
-            day.read_input()?;
             let one_result = day.puzzle1()?;
             let two_result = day.puzzle2()?;
             Ok((one_result, two_result))
@@ -31,7 +32,6 @@ fn main() -> Result<(), AdventError> {
     } else {
         let day_index = env::args().nth(1).ok_or(AdventError("Failed to parse day".into()))?.parse::<usize>()? - 1;
         let day = &mut advent_days[day_index];
-        day.read_input()?;
         if env::args().len() == 3 {
             match env::args().nth(2).unwrap().parse::<usize>()? {
                 1 => Ok(println!("1: {}", &day.puzzle1()?)),