Day 6

src/day_6_1/mod.rs

+use crate::util::*;
+
+pub fn solve_from_str(input: &str) -> u32 {
+    let mut lines = input.lines();
+
+    let times = regex_positive_numbers(lines.next().unwrap());
+    let distances = regex_positive_numbers(lines.next().unwrap());
+
+    let mut result = 1;
+
+    for i in 0..times.len() {
+        let mut options = 0;
+
+        for k in 0..times[i] {
+            let speed = k;
+            let distance = speed * (times[i] - k);
+
+            if distance > distances[i] {
+                options += 1;
+            }
+        }
+
+        result *= options;
+    }
+
+    result
+}

src/day_6_2/mod.rs

+use crate::util::*;
+
+pub fn solve_from_str(input: &str) -> u64 {
+    let mut lines = input.lines();
+
+    let times = regex_positive_numbers_u64(&lines.next().unwrap().replace(" ", ""));
+    let distances = regex_positive_numbers_u64(&lines.next().unwrap().replace(" ", ""));
+
+    let mut result = 1;
+
+    for i in 0..times.len() {
+        let mut options = 0;
+
+        for k in 0..times[i] {
+            let speed = k;
+            let distance = speed * (times[i] - k);
+
+            if distance > distances[i] {
+                options += 1;
+            }
+        }
+
+        result *= options;
+    }
+
+    result
+}

src/main.rs

@@ -8,6 +8,8 @@ mod day_4_1;
 mod day_4_2;
 mod day_5_1;
 mod day_5_2;
+mod day_6_1;
+mod day_6_2;
 
 mod util;
 
@@ -16,7 +18,7 @@ use std::fs;
 fn main() {
     let input = fs::read_to_string("input").expect("Could not read input!");
 
-    let solution = day_5_2::solve_from_str(input.as_str());
+    let solution = day_6_2::solve_from_str(input.as_str());
 
     println!("Solution: {}", solution);
 }