day14 both parts

src/main.rs

@@ -1,4 +1,4 @@
 fn main() {
-    aoc_2018::tasks::day13::task1();
-    // aoc_2018::tasks::day09::task2();
+    // aoc_2018::tasks::day14::task1();
+    aoc_2018::tasks::day14::task2();
 }

src/tasks/day14.rs

@@ -0,0 +1,55 @@
+pub fn task1() {
+    let input: usize = 509671;
+
+    let mut scores = vec![3, 7];
+    let mut recipes = vec![0, 1];
+
+    while scores.len() < input + 10 {
+        let mut score: usize = recipes.iter().map(|recipe| scores[*recipe]).sum();
+        if score >= 10 {
+            scores.push(1);
+            score -= 10;
+        }
+        scores.push(score);
+
+        for recipe in recipes.iter_mut() {
+            *recipe = (*recipe + 1 + scores[*recipe]) % scores.len();
+        }
+    }
+
+    let result = scores[input..input + 10]
+        .iter()
+        .map(|s| s.to_string())
+        .collect::<String>();
+    println!("Last 10 for {}: {}", input, result);
+}
+
+pub fn task2() {
+    let input = vec![5, 0, 9, 6, 7, 1];
+
+    let mut scores = vec![3, 7];
+    let mut recipes = vec![0, 1];
+
+    while scores.len() < 7
+        || scores[scores.len() - 6..] != input[..]
+            && scores[scores.len() - 7..scores.len() - 1] != input[..]
+    {
+        let mut score: usize = recipes.iter().map(|recipe| scores[*recipe]).sum();
+        if score >= 10 {
+            scores.push(1);
+            score -= 10;
+        }
+        scores.push(score);
+
+        for recipe in recipes.iter_mut() {
+            *recipe = (*recipe + 1 + scores[*recipe]) % scores.len();
+        }
+    }
+
+    if scores[scores.len() - 6..] != input[..] {
+        println!("{}", scores.len() - 7)
+    } else {
+        println!("{}", scores.len() - 8)
+    }
+    // 20227890 too high
+}

src/tasks/mod.rs

@@ -11,3 +11,4 @@ pub mod day10;
 pub mod day11;
 pub mod day12;
 pub mod day13;
+pub mod day14;