Late start, but day 6 was suprisingly easy.

src/day06/part1.rs

@@ -1,7 +1,11 @@
 use crate::utilities::*;
 
-pub fn part1() -> usize {
-    unimplemented!()
+pub fn part1(input: &str) -> usize {
+    input
+        .as_bytes()
+        .windows(4)
+        .position(|x| !find_dupes_stupid(x))
+        .unwrap()+4
 }
 
 #[cfg(test)]
@@ -10,6 +14,10 @@ mod tests {
 
     #[test]
     fn test_part1() {
-        assert_eq!(part1(), 0);
+        assert_eq!(part1("mjqjpqmgbljsphdztnvjfqwrcgsmlb"), 7);
+        assert_eq!(part1("bvwbjplbgvbhsrlpgdmjqwftvncz"), 5);
+        assert_eq!(part1("nppdvjthqldpwncqszvftbrmjlhg"), 6);
+        assert_eq!(part1("nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg"), 10);
+        assert_eq!(part1("zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw"), 11);
     }
 }