Day 6 was easy af

src/day6/mod.rs

@@ -0,0 +1,45 @@
+use crate::utils::Day;
+
+#[derive(Debug, Default)]
+pub struct Day6 {
+    pub input: String,
+}
+
+impl Day for Day6 {
+    fn part1(&mut self) -> String {
+        let lines = self.input.lines().map(|l| l.split_ascii_whitespace().skip(1).collect::<Vec<_>>()).collect::<Vec<_>>();
+        let races = [
+            (lines[0][0].parse().unwrap(), lines[1][0].parse().unwrap()),
+            (lines[0][1].parse().unwrap(), lines[1][1].parse().unwrap()),
+            (lines[0][2].parse().unwrap(), lines[1][2].parse().unwrap()),
+            (lines[0][3].parse().unwrap(), lines[1][3].parse().unwrap()),
+        ];
+
+        let mut acc = 1usize;
+
+        for (time, record_distance) in races {
+            let mut wins = 0usize;
+            for time_holding_button in 0..time {
+                let distance = (time - time_holding_button) * time_holding_button /* velocity */;
+                if distance > record_distance { wins += 1; }
+            }
+
+            acc *= wins;
+        }
+
+        acc.to_string()
+    }
+
+    fn part2(&mut self) -> String {
+        let lines = self.input.lines().map(|l| l[10..].split_ascii_whitespace().collect::<String>()).collect::<Vec<_>>();
+
+        let (time, record_distance): (u128, u128) = (lines[0].parse().unwrap(), lines[1].parse().unwrap());
+        let mut wins = 0u128;
+        for time_holding_button in 0..time {
+            let distance = (time - time_holding_button) * time_holding_button /* velocity */;
+            if distance > record_distance { wins += 1; }
+        }
+
+        wins.to_string()
+    }
+}

src/main.rs

@@ -6,13 +6,14 @@ use std::{
 
 use clap::{Parser, Subcommand};
 
-use crate::{day1::Day1, day2::Day2, day3::Day3, day4::Day4, day5::Day5, utils::Day};
+use crate::{day1::Day1, day2::Day2, day3::Day3, day4::Day4, day5::Day5, day6::Day6, utils::Day};
 
 pub mod day1;
 pub mod day2;
 pub mod day3;
 pub mod day4;
 pub mod day5;
+pub mod day6;
 pub mod fetcher;
 pub mod utils;
 
@@ -92,6 +93,7 @@ async fn main() {
                     cards: HashMap::new(),
                 }),
                 5 => Box::new(Day5 { input }),
+                6 => Box::new(Day6 { input }),
                 _ => panic!("Invalid day #"),
             };
             let start = std::time::Instant::now();
@@ -146,6 +148,7 @@ async fn main() {
                     cards: HashMap::new(),
                 }),
                 5 => Box::new(Day5 { input: response }),
+                6 => Box::new(Day6 { input: response }),
                 _ => panic!("Invalid day #"),
             };
             let mut timings = Vec::<Duration>::new();