Day 06

2022/src/bin/06.rs

@@ -0,0 +1,58 @@
+use std::collections::HashSet;
+
+// type opcode<'a> = (usize, &'a str);
+
+fn get_opcodes(input: &str, len: usize) -> Vec<usize> {
+    let mut ops: Vec<usize> = Vec::new();
+
+    for i in len..input.len() {
+        let op: Vec<char> = input[i-len..i].chars().collect();
+        let setop: HashSet<char> = HashSet::from_iter(op.iter().copied());
+
+        // println!("{len}: {i} {op:?}");
+
+        if setop.len() == len {
+            ops.push(i);
+            // println!("\t pog");
+        }
+    }
+
+    ops
+}
+
+pub fn part_one(input: &str) -> Option<u32> {
+    let cringe = get_opcodes(input, 4);
+    let first = *cringe.first().unwrap();
+
+    Some(first as u32)
+}
+
+pub fn part_two(input: &str) -> Option<u32> {
+    let cringe = get_opcodes(input, 14);
+    let first = *cringe.first().unwrap();
+
+    Some(first as u32)
+}
+
+fn main() {
+    let input = &advent_of_code::read_file("inputs", 6);
+    advent_of_code::solve!(1, part_one, input);
+    advent_of_code::solve!(2, part_two, input);
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        let input = advent_of_code::read_file("examples", 6);
+        assert_eq!(part_one(&input), Some(7));
+    }
+
+    #[test]
+    fn test_part_two() {
+        let input = advent_of_code::read_file("examples", 6);
+        assert_eq!(part_two(&input), Some(19));
+    }
+}

2022/src/examples/06.txt

@@ -0,0 +1 @@
+mjqjpqmgbljsphdztnvjfqwrcgsmlb