day 11 done

2023/day-11/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "day-11"
+version.workspace = true
+edition.workspace = true
+authors.workspace = true
+repository.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nom = { workspace = true }
+itertools = {workspace = true }
+glam = {workspace = true}
+nom_locate = {workspace = true }

2023/day-11/src/lib.rs

@@ -0,0 +1,4 @@
+pub mod part1;
+pub use crate::part1::*;
+pub mod part2;
+pub use crate::part2::*;

2023/day-11/src/main.rs

@@ -0,0 +1,12 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+use day_11::part1;
+use day_11::part2;
+
+fn main() {
+    let input = include_str!("./input.txt");
+    let part1_result = part1(input);
+    println!("part 1: {part1_result}");
+    let part2_result = part2(input, 1_000_000);
+    println!("part 2: {part2_result}");
+}

2023/day-11/src/part1.rs

@@ -0,0 +1,95 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+use glam::IVec2;
+use itertools::Itertools;
+use std::collections::HashSet;
+
+#[must_use]
+pub fn part1(input: &str) -> String {
+    let points = parse_input(input);
+    let ((min_x, min_y), (mut max_x, /*mut*/ max_y)) = points.iter().fold(
+        ((i32::MAX, i32::MAX), (i32::MIN, i32::MIN)),
+        |((min_x, min_y), (max_x, max_y)), pos| {
+            let min_x = min_x.min(pos.x);
+            let min_y = min_y.min(pos.y);
+            let max_x = max_x.max(pos.x);
+            let max_y = max_y.max(pos.y);
+            ((min_x, min_y), (max_x, max_y))
+        },
+    );
+    let mut modifier = 0;
+    let mut adjusted_points = HashSet::new();
+    for x in min_x..=max_x {
+        let column = (min_y..=max_y)
+            .filter_map(|y| points.get(&(x, y).into()))
+            .collect::<Vec<_>>();
+        if column.is_empty() {
+            modifier += 1;
+        }
+        for point in column {
+            adjusted_points.insert(*point + IVec2::new(modifier, 0));
+        }
+    }
+    max_x += modifier;
+
+    let mut modifier = 0;
+    let mut points = HashSet::new();
+    for y in min_y..=max_y {
+        let row = (min_x..=max_x)
+            .filter_map(|x| adjusted_points.get(&(x, y).into()))
+            .collect::<Vec<_>>();
+        if row.is_empty() {
+            modifier += 1;
+        }
+        for point in row {
+            points.insert(*point + IVec2::new(0, modifier));
+        }
+    }
+    //max_y += modifier;
+    (points
+        .iter()
+        .cartesian_product(points.iter())
+        .filter_map(|(a, b)| (a != b).then_some(*a - *b))
+        .map(|pos| pos.x.abs() + pos.y.abs())
+        .sum::<i32>()
+        / 2)
+    .to_string()
+}
+
+fn parse_input(input: &str) -> HashSet<IVec2> {
+    input
+        .lines()
+        .enumerate()
+        .flat_map(|(y, line)| {
+            line.chars().enumerate().filter_map(move |(x, c)| {
+                (c != '.').then_some(IVec2::new(
+                    i32::try_from(x).unwrap(),
+                    i32::try_from(y).unwrap(),
+                ))
+            })
+        })
+        .collect()
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    const INPUT: &str = "...#......
+.......#..
+#.........
+..........
+......#...
+.#........
+.........#
+..........
+.......#..
+#...#.....";
+
+    #[test]
+    fn part1_works() {
+        let result = part1(INPUT);
+        assert_eq!(result, "374".to_string());
+    }
+}
+

2023/day-11/src/part2.rs

@@ -0,0 +1,103 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+use glam::I64Vec2;
+use itertools::Itertools;
+use std::collections::HashSet;
+
+/// day 11 part 2 of aoc 2023
+///
+/// # Arguments
+/// - input the input for today's puzzle
+///
+/// # Panics
+/// panics whne it cannot parse the input OR when ever the number of game numbers is greater than
+/// usize
+#[must_use]
+pub fn part2(input: &str, modr: i64) -> String {
+    let points = parse_input(input);
+    let ((min_x, min_y), (mut max_x, /*mut*/ max_y)) = points.iter().fold(
+        ((i64::MAX, i64::MAX), (i64::MIN, i64::MIN)),
+        |((min_x, min_y), (max_x, max_y)), pos| {
+            let min_x = min_x.min(pos.x);
+            let min_y = min_y.min(pos.y);
+            let max_x = max_x.max(pos.x);
+            let max_y = max_y.max(pos.y);
+            ((min_x, min_y), (max_x, max_y))
+        },
+    );
+    let mut modifier = 0;
+    let mut adjusted_points = HashSet::new();
+    for x in min_x..=max_x {
+        let column = (min_y..=max_y)
+            .filter_map(|y| points.get(&(x, y).into()))
+            .collect::<Vec<_>>();
+        if column.is_empty() {
+            modifier += modr-1;
+        }
+        for point in column {
+            adjusted_points.insert(*point + I64Vec2::new(modifier, 0));
+        }
+    }
+    max_x += modifier;
+
+    let mut modifier = 0;
+    let mut points = HashSet::new();
+    for y in min_y..=max_y {
+        let row = (min_x..=max_x)
+            .filter_map(|x| adjusted_points.get(&(x, y).into()))
+            .collect::<Vec<_>>();
+        if row.is_empty() {
+            modifier += modr-1;
+        }
+        for point in row {
+            points.insert(*point + I64Vec2::new(0, modifier));
+        }
+    }
+    //max_y += modifier;
+    (points
+        .iter()
+        .cartesian_product(points.iter())
+        .filter_map(|(a, b)| (*a != *b).then_some(*a-*b))
+        .map(|a| u64::try_from(a.x.abs()+a.y.abs()).unwrap())
+        .sum::<u64>()
+        / 2)
+    .to_string()
+}
+
+fn parse_input(input: &str) -> HashSet<I64Vec2> {
+    input
+        .lines()
+        .enumerate()
+        .flat_map(|(y, line)| {
+            line.chars().enumerate().filter_map(move |(x, c)| {
+                (c != '.').then_some(I64Vec2::new(
+                    i64::try_from(x).unwrap(),
+                    i64::try_from(y).unwrap(),
+                ))
+            })
+        })
+        .collect()
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    const INPUT: &str = "...#......
+.......#..
+#.........
+..........
+......#...
+.#........
+.........#
+..........
+.......#..
+#...#.....";
+
+    #[test]
+    fn part2_works() {
+        let result = part2(INPUT, 10);
+        assert_eq!(result, "1030".to_string());
+    }
+}
+