Finish part-1

2025/daily-template/src/part2.rs

@@ -3,7 +3,7 @@ use miette::miette;
 #[tracing::instrument]
 #[allow(clippy::missing_panics_doc)]
 #[allow(clippy::missing_errors_doc)]
-pub fn process(input: &str) -> Result<usize> {
+pub fn process(input: &str) -> miette::Result<usize> {
     todo!("day xx - part 2");
     Ok(0)
 }

2025/day-10/src/part1.rs

@@ -1,10 +1,193 @@
 use miette::miette;
+use std::{collections::HashSet, slice::Iter, str::FromStr, vec};
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+enum Light {
+    On,
+    Off,
+}
+
+impl TryFrom<char> for Light {
+    type Error = String;
+    fn try_from(ch: char) -> Result<Self, Self::Error> {
+        match ch {
+            '#' => Ok(Self::On),
+            '.' => Ok(Self::Off),
+            _ => Err("Unknown Light status".to_string()),
+        }
+    }
+}
+
+impl Light {
+    const fn toggle(&self) -> Self {
+        match self {
+            Self::On => Self::Off,
+            Self::Off => Self::On,
+        }
+    }
+}
+
+// [.##.]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+struct IndicatorLight(Vec<Light>);
+
+impl FromStr for IndicatorLight {
+    type Err = String;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let trimmed = s.trim();
+        let digits_str = trimmed
+            .strip_prefix('[')
+            .and_then(|s| s.strip_suffix(']'))
+            .unwrap_or("");
+
+        let lights = digits_str
+            .chars()
+            .map(Light::try_from)
+            .collect::<Result<Vec<_>, _>>()?;
+        Ok(Self(lights))
+    }
+}
+
+impl IndicatorLight {
+    fn toggle(&mut self, button: &Button) {
+        for &btn in button.iter() {
+            let light = self.0.get_mut(btn).expect("light exsists");
+            *light = light.toggle();
+        }
+    }
+
+    const fn len(&self) -> usize {
+        self.0.len()
+    }
+
+    fn with_capacity(capacity: usize) -> Self {
+        Self(vec![Light::Off; capacity])
+    }
+}
+
+// (3) (1,3) (2) (2,3) (0,2) (0,1)
+#[derive(Debug, Clone)]
+struct Button(Vec<usize>);
+
+impl FromStr for Button {
+    type Err = String;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let trimmed = s.trim();
+        let digits_str = trimmed
+            .strip_prefix('(')
+            .and_then(|s| s.strip_suffix(')'))
+            .unwrap_or(trimmed);
+
+        let button = digits_str
+            .split(',')
+            .map(|s| s.parse::<usize>().map_err(|e| e.to_string()))
+            .collect::<Result<Vec<_>, _>>()?;
+        Ok(Self(button))
+    }
+}
+
+impl Button {
+    fn iter(&self) -> Iter<'_, usize> {
+        self.0.iter()
+    }
+}
+
+// {3,5,4,7}
+#[derive(Debug, Clone)]
+struct Joltage(Vec<usize>);
+
+impl FromStr for Joltage {
+    type Err = String;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let trimmed = s.trim();
+        let digits_str = trimmed
+            .strip_prefix('{')
+            .and_then(|s| s.strip_suffix('}'))
+            .unwrap_or(trimmed);
+
+        let joltage = digits_str
+            .split(',')
+            .map(|s| s.parse::<usize>().map_err(|e| e.to_string()))
+            .collect::<Result<Vec<_>, _>>()?;
+        Ok(Self(joltage))
+    }
+}
+
+// [.##.] (3) (1,3) (2) (2,3) (0,2) (0,1) {3,5,4,7}
+#[derive(Debug, Clone)]
+struct Machine {
+    final_state: IndicatorLight, // [.##.]
+    current_state: IndicatorLight,
+    buttons: Vec<Button>, // (3) (1,3) (2) (2,3) (0,2) (0,1)
+    _joltage: Joltage,    // {3,5,4,7}
+}
+
+impl FromStr for Machine {
+    type Err = String;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let trimmed = s.trim();
+
+        let bracket_start = trimmed.find('[').ok_or("Missing '['")?;
+        let bracket_end = trimmed.find(']').ok_or("Missing ']'")?;
+        let final_state = trimmed[bracket_start..=bracket_end].parse::<IndicatorLight>()?;
+        let state_len = final_state.len();
+
+        let brace_start = trimmed.find('{').ok_or("Missing '{'")?;
+        let brace_end = trimmed.find('}').ok_or("Missing '}'")?;
+        let joltage = trimmed[brace_start..=brace_end].parse()?;
+
+        let buttons_str = trimmed[bracket_end + 1..brace_start].trim();
+        let buttons = buttons_str
+            .split_whitespace()
+            .map(Button::from_str)
+            .collect::<Result<Vec<_>, _>>()?;
+
+        Ok(Self {
+            final_state,
+            current_state: IndicatorLight::with_capacity(state_len),
+            buttons,
+            _joltage: joltage,
+        })
+    }
+}
+
 #[tracing::instrument]
 #[allow(clippy::missing_panics_doc)]
 #[allow(clippy::missing_errors_doc)]
 pub fn process(input: &str) -> miette::Result<usize> {
-    todo!("day xx - part 1");
-    Ok(0)
+    let machines = input
+        .lines()
+        .map(Machine::from_str)
+        .collect::<Result<Vec<_>, _>>()
+        .map_err(|e| miette!("{e}"))?;
+
+    let result = machines
+        .iter()
+        .map(|machine| {
+            let mut set = HashSet::new();
+            set.insert(machine.current_state.clone());
+            let mut i = 0;
+            loop {
+                set = set
+                    .into_iter()
+                    .flat_map(|state| {
+                        machine.buttons.iter().map(move |btn| {
+                            let mut new_state = state.clone();
+                            new_state.toggle(btn);
+                            new_state
+                        })
+                    })
+                    .collect();
+                i += 1;
+                if set.contains(&machine.final_state) {
+                    break;
+                }
+            }
+            i
+        })
+        .sum();
+
+    Ok(result)
 }
 
 #[cfg(test)]
@@ -16,7 +199,8 @@ mod tests {
         let input = "[.##.] (3) (1,3) (2) (2,3) (0,2) (0,1) {3,5,4,7}
 [...#.] (0,2,3,4) (2,3) (0,4) (0,1,2) (1,2,3,4) {7,5,12,7,2}
 [.###.#] (0,1,2,3,4) (0,3,4) (0,1,2,4,5) (1,2) {10,11,11,5,10,5}";
-        let result = 0;
+
+        let result = 7;
         assert_eq!(process(input)?, result);
         Ok(())
     }

2025/day-10/src/part2.rs

@@ -3,7 +3,7 @@ use miette::miette;
 #[tracing::instrument]
 #[allow(clippy::missing_panics_doc)]
 #[allow(clippy::missing_errors_doc)]
-pub fn process(input: &str) -> Result<usize> {
+pub fn process(input: &str) -> miette::Result<usize> {
     todo!("day xx - part 2");
     Ok(0)
 }