Day 6 done

2022/rust/Cargo.toml

@@ -34,4 +34,8 @@ path = "src/day4-alt1.rs"
 name = "day5"
 path = "src/day5.rs"
 
+[[bin]]
+name = "day6"
+path = "src/day6.rs"
+
 [dependencies]

2022/rust/src/day6.rs

@@ -0,0 +1,72 @@
+mod common;
+
+use std::collections::HashSet;
+
+type Input = String;
+type Result = usize;
+
+fn processed_input(input: &str) -> Input {
+    input.to_owned()
+}
+
+fn part1(input: &Input) -> Result {
+    let c: Vec<char> = input.chars().collect();
+    for i in 3.. {
+        if c[i] != c[i - 1]
+            && c[i] != c[i - 2]
+            && c[i] != c[i - 3]
+            && c[i - 1] != c[i - 2]
+            && c[i - 1] != c[i - 3]
+            && c[i - 2] != c[i - 3]
+        {
+            return i + 1;
+        }
+    }
+
+    0
+}
+
+fn part2(input: &Input) -> Result {
+    let c: Vec<char> = input.chars().collect();
+    println!("{} {}", 88, c.len());
+
+    for i in 13..c.len() {
+        let mut s: HashSet<char> = HashSet::new();
+        for j in i - 13..=i {
+            s.insert(c[j]);
+        }
+        if s.len() == 14 {
+            return i + 1;
+        }
+    }
+
+    0
+}
+
+fn main() {
+    let input_text = common::day_input(6);
+    let input = processed_input(&input_text);
+    let input2 = processed_input(&input_text);
+    common::show_answers(&part1(&input), &part2(&input2))
+    // common::show_both_answers(&both_parts(&input))
+}
+
+// fn both_parts(input: &Input) -> (Result, Result) {
+//     (0, 0)
+// }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const TEST_INPUT: &str = "mjqjpqmgbljsphdztnvjfqwrcgsmlb";
+
+    #[test]
+    fn test() {
+        // let input = processed_input(TEST_INPUT);
+        // assert_eq!(part1(&input), 7);
+        let input = processed_input(TEST_INPUT);
+        assert_eq!(part2(&input), 19);
+        // assert_eq!(both_parts(&input), (0, 0));
+    }
+}