add until day05-1

.gitignore

@@ -0,0 +1 @@
+**/target

day01/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day01"
+version = "0.1.0"

day01/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "day01"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

day01/example.txt

@@ -0,0 +1 @@
+()())

day01/src/main.rs

@@ -0,0 +1,32 @@
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+fn main() {
+    let data = std::io::read_to_string(std::fs::File::open(FILENAME).unwrap()).unwrap();
+    let s = data.trim();
+
+    part_1(s);
+    part_2(s);
+}
+
+fn part_1(data: &str) {
+    let result: i64 = data.chars().map(|c| if c == '(' { 1 } else { -1 }).sum();
+    println!("{result}");
+}
+
+fn part_2(data: &str) {
+    let mut current_floor: i64 = 0;
+    for (i, c) in data.chars().enumerate() {
+        if c == '(' {
+            current_floor += 1;
+        } else {
+            current_floor -= 1;
+        }
+        if current_floor == -1 {
+            println!("{}", i + 1);
+            break;
+        }
+    }
+}

day02/Cargo.lock

@@ -0,0 +1,25 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day02"
+version = "0.1.0"
+dependencies = [
+ "itertools",
+]
+
+[[package]]
+name = "either"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91622ff5e7162018101f2fea40d6ebf4a78bbe5a49736a2020649edf9693679e"
+
+[[package]]
+name = "itertools"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+dependencies = [
+ "either",
+]

day02/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day02"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+itertools = "0.14.0"

day02/example.txt

@@ -0,0 +1,2 @@
+2x3x4
+1x1x10

day02/src/main.rs

@@ -0,0 +1,46 @@
+use itertools::Itertools;
+
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+fn main() {
+    let data = std::fs::read_to_string(FILENAME).unwrap();
+
+    part_1(&data);
+    part_2(&data);
+}
+
+fn part_2(data: &str) {
+    let mut sum = 0;
+    for line in data.lines() {
+        let edges: Vec<_> = line
+            .split('x')
+            .map(|x| x.parse::<usize>().unwrap())
+            .collect();
+
+        let perimeter = edges.iter().sorted().take(2).sum::<usize>() * 2;
+        let volume = edges.iter().product::<usize>();
+
+        sum += perimeter + volume;
+    }
+    println!("{sum}");
+}
+
+fn part_1(data: &str) {
+    let mut sum = 0;
+    for line in data.lines() {
+        let sides: Vec<_> = line
+            .split('x')
+            .map(|x| x.parse::<usize>().unwrap())
+            .combinations(2)
+            .map(|x| x[0] * x[1])
+            .collect();
+
+        let smallest = sides.iter().min().copied().unwrap();
+
+        sum += sides.into_iter().sum::<usize>() * 2 + smallest;
+    }
+    println!("{sum}");
+}

day03/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day03"
+version = "0.1.0"

day03/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "day03"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

day03/example.txt

@@ -0,0 +1 @@
+^v^v^v^v^v

day03/src/main.rs

@@ -0,0 +1,69 @@
+use std::collections::HashSet;
+
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+fn main() {
+    let data = std::fs::read_to_string(FILENAME).unwrap();
+
+    part_1(&data);
+    part_2(&data);
+}
+
+fn part_2(data: &str) {
+    let mut hs = HashSet::new();
+
+    let mut xs: isize = 0;
+    let mut ys: isize = 0;
+
+    let mut xr: isize = 0;
+    let mut yr: isize = 0;
+
+    hs.insert((xs, ys));
+
+    for (idx, c) in data.trim().chars().enumerate() {
+        let x;
+        let y;
+        if idx % 2 == 0 {
+            x = &mut xs;
+            y = &mut ys;
+        } else {
+            x = &mut xr;
+            y = &mut yr;
+        }
+        match c {
+            '^' => *y += 1,
+            '>' => *x += 1,
+            '<' => *x -= 1,
+            'v' => *y -= 1,
+            _ => unreachable!(),
+        };
+        hs.insert((*x, *y));
+    }
+
+    println!("{}", hs.len());
+}
+
+fn part_1(data: &str) {
+    let mut hs = HashSet::new();
+
+    let mut x: isize = 0;
+    let mut y: isize = 0;
+
+    hs.insert((x, y));
+
+    for c in data.trim().chars() {
+        match c {
+            '^' => y += 1,
+            '>' => x += 1,
+            '<' => x -= 1,
+            'v' => y -= 1,
+            _ => unreachable!(),
+        };
+        hs.insert((x, y));
+    }
+
+    println!("{}", hs.len());
+}

day04/Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day04"
+version = "0.1.0"
+dependencies = [
+ "md5",
+]
+
+[[package]]
+name = "md5"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae960838283323069879657ca3de837e9f7bbb4c7bf6ea7f1b290d5e9476d2e0"

day04/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day04"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+md5 = "0.8.0"

day04/example.txt

@@ -0,0 +1 @@
+abcdef

day04/input.txt

@@ -0,0 +1 @@
+yzbqklnj

day04/src/main.rs

@@ -0,0 +1,27 @@
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+fn main() {
+    let data = std::fs::read_to_string(FILENAME).unwrap();
+
+    part_1_and_2(data.trim(), 5);
+    part_1_and_2(data.trim(), 6);
+}
+
+fn part_1_and_2(key: &str, length: usize) {
+    for i in 1.. {
+        let mut input = String::from(key);
+        input.push_str(&i.to_string());
+
+        let hash = md5::compute(input);
+
+        let hash_str = format!("{:x?}", hash);
+
+        if hash_str.chars().take(length).all(|c| c == '0') {
+            println!("{i}");
+            break;
+        }
+    }
+}

day05/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day05"
+version = "0.1.0"

day05/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "day05"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

day05/example.txt

@@ -0,0 +1,9 @@
+ugknbfddgicrmopn
+aaa
+jchzalrnumimnmhp
+haegwjzuvuyypxyu
+dvszwmarrgswjxmb
+qjhvhtzxzqqjkmpb
+xxyxx
+uurcxstgmygtbstg
+ieodomkazucvgmuy

day05/src/main.rs

@@ -0,0 +1,40 @@
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+const VOWELS: &str = "aeiou";
+const FORBIDDEN: [&str; 4] = ["ab", "cd", "pq", "xy"];
+
+fn main() {
+    let data = std::fs::read_to_string(FILENAME).unwrap();
+
+    part_1_and_2(&data, is_nice_1);
+    part_1_and_2(&data, is_nice_2);
+}
+
+fn part_1_and_2<T: Fn(&&str) -> bool>(data: &str, f: T) {
+    let sum = data.lines().filter(f).count();
+    println!("{sum}");
+}
+
+fn is_nice_1(s: &&str) -> bool {
+    let vowel_count = s.chars().filter(|c| VOWELS.contains(*c)).count();
+
+    let double_letter = s.chars().zip(s.chars().skip(1)).any(|(a, b)| a == b);
+
+    let has_forbidden_tuple = s
+        .chars()
+        .zip(s.chars().skip(1))
+        .map(|(a, b)| format!("{a}{b}"))
+        .any(|tuple| FORBIDDEN.contains(&tuple.as_str()));
+
+    vowel_count >= 3 && double_letter && !has_forbidden_tuple
+}
+
+fn is_nice_2(s: &&str) -> bool {
+    let mut subrule_1 = false;
+    let mut subrule_2 = false;
+
+    subrule_1 && subrule_2
+}