10 files changed, 2532 insertions, 1 deletions

diff --git a/src/tests/Cargo.lock b/src/tests/Cargo.lock
index 3b1b134..244aab4 100644
--- a/src/tests/Cargo.lock
+++ b/src/tests/Cargo.lock
@@ -21,7 +21,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "aoc-2022-05"
+name = "aoc-2022-08"
+version = "0.1.0"
+dependencies = [
+ "criterion",
+ "primrose-library",
+ "rand",
+]
+
+[[package]]
+name = "aoc-2022-09"
 version = "0.1.0"
 dependencies = [
  "criterion",
diff --git a/src/tests/Cargo.toml b/src/tests/Cargo.toml
index d206105..c405635 100644
--- a/src/tests/Cargo.toml
+++ b/src/tests/Cargo.toml
@@ -2,6 +2,8 @@
 resolver = "2"
 members = [
         "aoc-2021-09",
+        "aoc-2022-08",
+        "aoc-2022-09",
         "example_sets",
         "example_stack",
         "prime_sieve"
diff --git a/src/tests/aoc-2022-08/Cargo.toml b/src/tests/aoc-2022-08/Cargo.toml
new file mode 100644
index 0000000..449bbdb
--- /dev/null
+++ b/src/tests/aoc-2022-08/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "aoc-2022-08"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = { workspace = true }
+primrose-library = { path = "../../crates/library" }
+
+[dev-dependencies]
+criterion = { workspace = true }
+
+[[bench]]
+name = "main"
+harness = false
diff --git a/src/tests/aoc-2022-08/benches/main.rs b/src/tests/aoc-2022-08/benches/main.rs
new file mode 100644
index 0000000..ceab4a8
--- /dev/null
+++ b/src/tests/aoc-2022-08/benches/main.rs
@@ -0,0 +1,31 @@
+use aoc_2022_08::HeightMap;
+use criterion::{criterion_group, criterion_main, BatchSize, BenchmarkId, Criterion};
+use rand::{rngs::StdRng, SeedableRng};
+
+fn run_benches(c: &mut Criterion) {
+    let mut rng = StdRng::seed_from_u64(42);
+    for size in [100, 500, 1000, 2000].iter() {
+        c.bench_with_input(BenchmarkId::new("part1", size), size, |b, &n| {
+            b.iter_batched_ref(
+                || HeightMap::gen(&mut rng, n),
+                |map| map.part1(),
+                BatchSize::SmallInput,
+            )
+        });
+
+        c.bench_with_input(BenchmarkId::new("part2", size), size, |b, &n| {
+            b.iter_batched_ref(
+                || HeightMap::gen(&mut rng, n),
+                |map| map.part2(),
+                BatchSize::SmallInput,
+            )
+        });
+    }
+}
+
+criterion_group!(
+    name = benches;
+    config = Criterion::default().sample_size(10);
+    targets = run_benches
+);
+criterion_main!(benches);
diff --git a/src/tests/aoc-2022-08/src/lib.rs b/src/tests/aoc-2022-08/src/lib.rs
new file mode 100644
index 0000000..9f60ac8
--- /dev/null
+++ b/src/tests/aoc-2022-08/src/lib.rs
@@ -0,0 +1,288 @@
+#![feature(type_alias_impl_trait)]
+
+use primrose_library::traits::*;
+use rand::{rngs::StdRng, Rng};
+
+mod types;
+use types::*;
+
+pub struct HeightMap {
+    map: Map<(usize, usize), usize>,
+    cols: usize,
+    rows: usize,
+}
+
+impl HeightMap {
+    pub fn new(map: Map<(usize, usize), usize>, cols: usize, rows: usize) -> Self {
+        Self { map, cols, rows }
+    }
+
+    pub fn gen(rng: &mut StdRng, n: usize) -> Self {
+        let mut map = Map::default();
+        for x in 0..n {
+            for y in 0..n {
+                map.insert((x, y), rng.gen_range(0..10));
+            }
+        }
+
+        Self {
+            map,
+            cols: n,
+            rows: n,
+        }
+    }
+
+    pub fn part1(&self) -> usize {
+        let mut grid = Map::default();
+
+        (0..self.rows).for_each(|grid_row| {
+            self.check_vis_along_run(
+                (0..self.cols).map(move |grid_col| (grid_row, grid_col)),
+                &mut grid,
+            );
+            self.check_vis_along_run(
+                (0..self.cols)
+                    .rev()
+                    .map(move |grid_col| (grid_row, grid_col)),
+                &mut grid,
+            )
+        });
+        (0..self.cols).for_each(|grid_col| {
+            self.check_vis_along_run(
+                (0..self.rows).map(move |grid_row| (grid_row, grid_col)),
+                &mut grid,
+            );
+            self.check_vis_along_run(
+                (0..self.rows)
+                    .rev()
+                    .map(move |grid_row| (grid_row, grid_col)),
+                &mut grid,
+            )
+        });
+
+        grid.iter().filter(|(_, v)| **v).count()
+    }
+
+    pub fn part2(&self) -> usize {
+        let mut grid = Map::default();
+
+        (0..self.rows).for_each(|grid_row| {
+            self.vis_score_along_run(
+                (0..self.cols).map(move |grid_col| (grid_row, grid_col)),
+                &mut grid,
+            );
+            self.vis_score_along_run(
+                (0..self.cols)
+                    .rev()
+                    .map(move |grid_col| (grid_row, grid_col)),
+                &mut grid,
+            )
+        });
+        (0..self.cols).for_each(|grid_col| {
+            self.vis_score_along_run(
+                (0..self.rows).map(move |grid_row| (grid_row, grid_col)),
+                &mut grid,
+            );
+            self.vis_score_along_run(
+                (0..self.rows)
+                    .rev()
+                    .map(move |grid_row| (grid_row, grid_col)),
+                &mut grid,
+            )
+        });
+
+        *grid.iter().map(|(_, score)| score).max().unwrap()
+    }
+
+    fn check_vis_along_run(
+        &self,
+        mut run: impl Iterator<Item = (usize, usize)>,
+        vis_grid: &mut Map<(usize, usize), bool>,
+    ) {
+        let mut curr_height = {
+            let (row_idx, col_idx) = run.next().unwrap();
+
+            vis_grid.insert((row_idx, col_idx), true);
+
+            self.map.get(&(row_idx, col_idx)).unwrap()
+        };
+        for (row_idx, col_idx) in run {
+            let height = self.map.get(&(row_idx, col_idx)).unwrap();
+            if height > curr_height {
+                curr_height = height;
+                vis_grid.insert((row_idx, col_idx), true);
+            }
+        }
+    }
+
+    fn vis_score_along_run(
+        &self,
+        run: impl Iterator<Item = (usize, usize)>,
+        vis_grid: &mut Map<(usize, usize), usize>,
+    ) {
+        let mut next_values = [0; 10];
+        for (row_idx, col_idx) in run {
+            let height = *self.map.get(&(row_idx, col_idx)).unwrap();
+            vis_grid.insert(
+                (row_idx, col_idx),
+                vis_grid.get(&(row_idx, col_idx)).unwrap_or(&1) * next_values[height as usize],
+            );
+
+            for (val, score) in next_values.iter_mut().enumerate() {
+                *score = if *score == 0 || val > height as usize {
+                    *score + 1
+                } else {
+                    1
+                };
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn parse_input(input: &str) -> HeightMap {
+        let mut grid: Vec<Vec<_>> = input
+            .lines()
+            .map(|x| {
+                x.chars()
+                    .map(|x| x.to_digit(10).unwrap() as usize)
+                    .collect()
+            })
+            .collect();
+
+        let (cols, rows) = (grid.len(), grid[0].len());
+        HeightMap::new(
+            grid.into_iter()
+                .enumerate()
+                .flat_map(|(c, vs)| vs.into_iter().enumerate().map(move |(r, v)| ((r, c), v)))
+                .collect(),
+            cols,
+            rows,
+        )
+    }
+
+    #[test]
+    fn test_small() {
+        let map = parse_input(SMALL_INPUT);
+
+        assert_eq!(map.part1(), 21, "part 1");
+        assert_eq!(map.part2(), 8, "part 2");
+    }
+
+    #[test]
+    fn test_large() {
+        let map = parse_input(LARGE_INPUT);
+
+        assert_eq!(map.part1(), 1859, "part 1");
+        assert_eq!(map.part2(), 332640, "part 2");
+    }
+
+    const SMALL_INPUT: &str = "30373
+25512
+65332
+33549
+35390";
+
+    const LARGE_INPUT: &str = "100221200032023210231132410224121421011444302143121341425413411104320412140011030313333000220101112
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+}
diff --git a/src/tests/aoc-2022-08/src/types.pr.rs b/src/tests/aoc-2022-08/src/types.pr.rs
new file mode 100644
index 0000000..5e3950c
--- /dev/null
+++ b/src/tests/aoc-2022-08/src/types.pr.rs
@@ -0,0 +1,3 @@
+/*SPEC*
+type Map<K,V> = {c impl (Mapping) | true}
+ *ENDSPEC*/
diff --git a/src/tests/aoc-2022-09/Cargo.toml b/src/tests/aoc-2022-09/Cargo.toml
new file mode 100644
index 0000000..f806c9c
--- /dev/null
+++ b/src/tests/aoc-2022-09/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "aoc-2022-09"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = { workspace = true }
+primrose-library = { path = "../../crates/library" }
+
+[dev-dependencies]
+criterion = { workspace = true }
+
+[[bench]]
+name = "main"
+harness = false
diff --git a/src/tests/aoc-2022-09/benches/main.rs b/src/tests/aoc-2022-09/benches/main.rs
new file mode 100644
index 0000000..bd5f92c
--- /dev/null
+++ b/src/tests/aoc-2022-09/benches/main.rs
@@ -0,0 +1,31 @@
+use aoc_2022_09::{gen_moves, part1, part2};
+use criterion::{criterion_group, criterion_main, BatchSize, BenchmarkId, Criterion};
+use rand::{rngs::StdRng, SeedableRng};
+
+fn run_benches(c: &mut Criterion) {
+    let mut rng = StdRng::seed_from_u64(42);
+    for size in [100, 1000, 2000, 10_000, 50_000].iter() {
+        c.bench_with_input(BenchmarkId::new("part1", size), size, |b, &n| {
+            b.iter_batched_ref(
+                || gen_moves(&mut rng, n).collect::<Vec<_>>(),
+                |moves| part1(moves.iter()),
+                BatchSize::SmallInput,
+            )
+        });
+
+        c.bench_with_input(BenchmarkId::new("part2", size), size, |b, &n| {
+            b.iter_batched_ref(
+                || gen_moves(&mut rng, n).collect::<Vec<_>>(),
+                |moves| part2(moves.iter()),
+                BatchSize::SmallInput,
+            )
+        });
+    }
+}
+
+criterion_group!(
+    name = benches;
+    config = Criterion::default().sample_size(10);
+    targets = run_benches
+);
+criterion_main!(benches);
diff --git a/src/tests/aoc-2022-09/src/lib.rs b/src/tests/aoc-2022-09/src/lib.rs
new file mode 100644
index 0000000..9bb7364
--- /dev/null
+++ b/src/tests/aoc-2022-09/src/lib.rs
@@ -0,0 +1,2126 @@
+#![feature(type_alias_impl_trait)]
+
+use primrose_library::traits::*;
+use rand::Rng;
+use std::cmp::min;
+
+mod types;
+use types::*;
+
+pub fn part1<'a>(moves: impl Iterator<Item = &'a Move>) -> usize {
+    visited_from_moves::<2>(moves)
+}
+
+pub fn part2<'a>(moves: impl Iterator<Item = &'a Move>) -> usize {
+    visited_from_moves::<10>(moves)
+}
+
+fn visited_from_moves<'a, const N: usize>(moves: impl Iterator<Item = &'a Move>) -> usize {
+    let mut tail_visited = Set::default();
+    tail_visited.insert((0, 0));
+    let mut knots = [(0, 0); N];
+    for mv in moves {
+        make_move(mv, &mut knots, &mut tail_visited);
+    }
+
+    tail_visited.len()
+}
+
+fn make_move(mv: &Move, knots: &mut [Pos], tail_visited: &mut Set<Pos>) {
+    let (dir, count) = mv;
+
+    for _ in 0..*count {
+        // Move head of rope
+        match dir {
+            Direction::Up => knots[0].1 += 1,
+            Direction::Down => knots[0].1 -= 1,
+            Direction::Right => knots[0].0 += 1,
+            Direction::Left => knots[0].0 -= 1,
+        };
+
+        for front_idx in 0..knots.len() - 1 {
+            let (fx, fy) = knots[front_idx];
+            let (bx, by) = &mut knots[front_idx + 1];
+            let (dx, dy) = (fx - *bx, fy - *by);
+            if (dx.abs() == 2 && dy == 0) || (dy.abs() == 2 && dx == 0) || (dy.abs() + dx.abs() > 2)
+            {
+                *bx += (dx.signum()) * min(dx.abs(), 1);
+                *by += (dy.signum()) * min(dy.abs(), 1);
+            }
+        }
+        tail_visited.insert(knots[knots.len() - 1]);
+    }
+}
+
+pub type Pos = (i32, i32);
+pub type Move = (Direction, u8);
+
+#[derive(Debug, Clone, Copy)]
+pub enum Direction {
+    Up,
+    Down,
+    Left,
+    Right,
+}
+
+pub fn gen_moves<R: Rng>(rng: &mut R, n: usize) -> impl Iterator<Item = Move> + '_ {
+    (0..n).map(|_| {
+        let dir = match rng.gen_range(0..4) {
+            0 => Direction::Up,
+            1 => Direction::Down,
+            2 => Direction::Left,
+            3 => Direction::Right,
+            _ => unreachable!(),
+        };
+        let count = rng.gen();
+
+        (dir, count)
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::*;
+
+    fn parse_moves(input: &str) -> impl Iterator<Item = Move> + '_ {
+        input.lines().map(|x| {
+            let (dir, count) = x.split_once(' ').unwrap();
+            let count = count.parse().unwrap();
+
+            (
+                match dir {
+                    "L" => Direction::Left,
+                    "R" => Direction::Right,
+                    "U" => Direction::Up,
+                    "D" => Direction::Down,
+                    _ => panic!("invalid direction, {}", dir),
+                },
+                count,
+            )
+        })
+    }
+
+    #[test]
+    fn test_small() {
+        let moves = parse_moves(SMALL_INPUT).collect::<Vec<_>>();
+        assert_eq!(part1(moves.iter()), 13, "part 1");
+        assert_eq!(part2(moves.iter()), 1, "part 2");
+    }
+
+    #[test]
+    fn test_large() {
+        let moves = parse_moves(LARGE_INPUT).collect::<Vec<_>>();
+        assert_eq!(part1(moves.iter()), 6236, "part 1");
+        assert_eq!(part2(moves.iter()), 2449, "part 2");
+    }
+
+    const SMALL_INPUT: &str = "R 4
+U 4
+L 3
+D 1
+R 4
+D 1
+L 5
+R 2";
+
+    const LARGE_INPUT: &str = "L 1
+R 1
+U 1
+R 1
+L 1
+U 2
+L 2
+R 1
+U 2
+D 2
+R 2
+D 2
+R 1
+U 1
+R 2
+L 1
+D 1
+L 2
+R 1
+D 1
+R 1
+U 1
+D 1
+R 1
+D 1
+R 1
+D 2
+L 2
+D 1
+R 2
+L 1
+R 2
+U 2
+R 1
+U 1
+D 2
+U 1
+R 1
+D 1
+R 2
+D 1
+L 2
+R 1
+U 1
+L 1
+U 1
+D 1
+U 1
+D 1
+L 1
+D 1
+R 1
+D 2
+L 1
+D 1
+L 1
+D 1
+R 1
+U 1
+D 2
+R 1
+D 1
+L 2
+D 2
+U 1
+L 1
+U 1
+L 1
+R 2
+U 1
+L 1
+D 1
+R 2
+L 2
+U 1
+D 2
+R 1
+U 1
+R 2
+L 2
+U 1
+L 2
+R 2
+D 1
+L 1
+R 1
+D 2
+L 2
+U 1
+L 2
+R 1
+U 2
+D 1
+U 2
+D 2
+L 2
+D 1
+R 1
+L 2
+R 2
+L 2
+R 2
+L 2
+R 2
+L 1
+U 1
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+U 1
+D 1
+R 2
+D 2
+R 2
+D 2
+L 2
+R 2
+U 3
+R 1
+U 3
+D 3
+U 1
+L 2
+D 2
+R 3
+D 1
+R 3
+U 1
+L 3
+R 3
+L 1
+U 3
+R 3
+U 3
+R 3
+U 2
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+}
diff --git a/src/tests/aoc-2022-09/src/types.pr.rs b/src/tests/aoc-2022-09/src/types.pr.rs
new file mode 100644
index 0000000..d4225a9
--- /dev/null
+++ b/src/tests/aoc-2022-09/src/types.pr.rs
@@ -0,0 +1,7 @@
+/*SPEC*
+property unique<T> {
+    \c <: (Container) -> ((for-all-elems c) \a -> ((unique-count? a) c))
+}
+
+type Set<T> = {c impl (Container) | (unique c)}
+ *ENDSPEC*/