d6p1

2023/day06/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "day06"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nom.workspace = true
+helper.workspace = true
+divan.workspace = true
+
+[[bench]]
+name = "benches"
+harness = false

2023/day06/benches/benches.rs

@@ -0,0 +1,3 @@
+fn main() {
+    day06::bench();
+}

2023/day06/input.txt

@@ -0,0 +1,2 @@
+Time:        40     92     97     90
+Distance:   215   1064   1505   1100

2023/day06/input_small.txt

@@ -0,0 +1,2 @@
+Time:      7  15   30
+Distance:  9  40  200

2023/day06/src/lib.rs

@@ -0,0 +1,83 @@
+use helper::{Day, IteratorExt, Variants};
+
+pub fn main() {
+    helper::main::<Day06>(include_str!("../input.txt"));
+}
+
+struct Day06;
+
+helper::define_variants! {
+    day => crate::Day06;
+    part1 {
+        basic => crate::part1;
+    }
+    part2 {
+        basic => crate::part2;
+    }
+}
+
+impl Day for Day06 {
+    fn part1() -> Variants {
+        part1_variants!(construct_variants)
+    }
+
+    fn part2() -> Variants {
+        part2_variants!(construct_variants)
+    }
+}
+
+#[derive(Debug)]
+struct Race {
+    time: u64,
+    distance: u64,
+}
+
+fn parse(input: &str) -> Vec<Race> {
+    let lines = input.lines().collect_array::<2>().unwrap();
+    lines[0]
+        .split_ascii_whitespace()
+        .zip(lines[1].split_ascii_whitespace())
+        .skip(1)
+        .map(|(time, distance)| Race {
+            time: time.parse().unwrap(),
+            distance: distance.parse().unwrap(),
+        })
+        .collect()
+}
+
+fn part1(input: &str) -> u64 {
+    let races = parse(input);
+
+    races
+        .iter()
+        .map(|race| {
+            let t = race.time;
+
+            (0..t)
+                .filter(|&i| {
+                    let t_run = t - i;
+                    let d = t_run * i;
+
+                    d > race.distance
+                })
+                .count() as u64
+        })
+        .product()
+}
+
+fn part2(_input: &str) -> u64 {
+    0
+}
+
+helper::tests! {
+    day06 Day06;
+    part1 {
+        small => 0;
+        default => 0;
+    }
+    part2 {
+        small => 0;
+        default => 0;
+    }
+}
+helper::benchmarks! {}

2023/day06/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    day06::main();
+}

Cargo.lock

@@ -170,6 +170,15 @@ dependencies = [
  "nom",
 ]
 
+[[package]]
+name = "day06"
+version = "0.1.0"
+dependencies = [
+ "divan",
+ "helper",
+ "nom",
+]
+
 [[package]]
 name = "divan"
 version = "0.1.4"