1 files changed, 38 insertions, 0 deletions
diff --git a/src/bin/2022/day6.rs b/src/bin/2022/day6.rs
new file mode 100644
index 0000000..6fe154f
--- /dev/null
+++ b/src/bin/2022/day6.rs
@@ -0,0 +1,38 @@
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+use advent_of_code::prelude::*;
+
+pub fn parse(fh: File) -> Result<String> {
+    Ok(parse::string(fh))
+}
+
+pub fn part1(s: String) -> Result<usize> {
+    for (i, slice) in s.as_bytes().windows(4).enumerate() {
+        if slice.iter().copied().collect::<HashSet<u8>>().len() == 4 {
+            return Ok(i + 4);
+        }
+    }
+    Err(anyhow!("couldn't find marker"))
+}
+
+pub fn part2(s: String) -> Result<usize> {
+    for (i, slice) in s.as_bytes().windows(14).enumerate() {
+        if slice.iter().copied().collect::<HashSet<u8>>().len() == 14 {
+            return Ok(i + 14);
+        }
+    }
+    Err(anyhow!("couldn't find marker"))
+}
+
+#[test]
+fn test() {
+    assert_eq!(
+        part1(parse(parse::data(2022, 6).unwrap()).unwrap()).unwrap(),
+        1155
+    );
+    assert_eq!(
+        part2(parse(parse::data(2022, 6).unwrap()).unwrap()).unwrap(),
+        2789
+    );
+}