add until day05-1

day05/src/main.rs

@@ -0,0 +1,40 @@
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+const VOWELS: &str = "aeiou";
+const FORBIDDEN: [&str; 4] = ["ab", "cd", "pq", "xy"];
+
+fn main() {
+    let data = std::fs::read_to_string(FILENAME).unwrap();
+
+    part_1_and_2(&data, is_nice_1);
+    part_1_and_2(&data, is_nice_2);
+}
+
+fn part_1_and_2<T: Fn(&&str) -> bool>(data: &str, f: T) {
+    let sum = data.lines().filter(f).count();
+    println!("{sum}");
+}
+
+fn is_nice_1(s: &&str) -> bool {
+    let vowel_count = s.chars().filter(|c| VOWELS.contains(*c)).count();
+
+    let double_letter = s.chars().zip(s.chars().skip(1)).any(|(a, b)| a == b);
+
+    let has_forbidden_tuple = s
+        .chars()
+        .zip(s.chars().skip(1))
+        .map(|(a, b)| format!("{a}{b}"))
+        .any(|tuple| FORBIDDEN.contains(&tuple.as_str()));
+
+    vowel_count >= 3 && double_letter && !has_forbidden_tuple
+}
+
+fn is_nice_2(s: &&str) -> bool {
+    let mut subrule_1 = false;
+    let mut subrule_2 = false;
+
+    subrule_1 && subrule_2
+}