day 06

aoc2023/src/day06.rs

@@ -0,0 +1,39 @@
+use std::iter::zip;
+use shared::{Solution, Answer};
+
+pub struct Day06;
+
+impl Solution for Day06 {
+    fn part_1(&self, input: &str) -> Answer {
+        let data: Vec<&str> = input.split("\n").collect();
+        let times: Vec<u64> = data[0].split_whitespace().skip(1).map(|x| x.parse::<u64>().unwrap()).collect();
+        let dists: Vec<u64> = data[1].split_whitespace().skip(1).map(|x| x.parse::<u64>().unwrap()).collect();
+
+        let mut out: u64 = 1;
+
+        for (t, d) in zip(times, dists) {
+            let mut win: u64 = 0;
+            for time in 1..t {
+                if time * (t-time) > d { win +=1 }
+            }
+            out *= win
+        }
+
+        Answer::from(out)
+    }
+
+    fn part_2(&self, input: &str) -> Answer {
+        let data: Vec<&str> = input.split("\n").collect();
+        let time: u64 = data[0].split_whitespace().skip(1).collect::<Vec<&str>>().join("").parse::<u64>().unwrap();
+        let dist: u64 = data[1].split_whitespace().skip(1).collect::<Vec<&str>>().join("").parse::<u64>().unwrap();
+
+        let mut win: u64 = 0;
+
+        for t in 1..time {
+            if t * (time - t) > dist { win += 1 }
+        }
+
+        Answer::from(win)
+    }
+}
+

aoc2023/src/lib.rs

@@ -2,3 +2,4 @@ pub mod day01;
 pub mod day02;
 pub mod day03;
 pub mod day05;
+pub mod day06;

data/2023/day06

@@ -0,0 +1,2 @@
+Time:        60     80     86     76
+Distance:   601   1163   1559   1300

src/main.rs

@@ -9,10 +9,10 @@ use std::time::Instant;
 fn main() {
     let now = Instant::now();
 
-    let Ok(data) = load(2023, 5)
+    let Ok(data) = load(2023, 6)
         else { return; };
 
-    let result = aoc2023::day05::Day05.part_2(&data);
+    let result = aoc2023::day06::Day06.part_2(&data);
 
     let elapsed = now.elapsed();