1 files changed, 57 insertions, 0 deletions
diff --git a/2022/Rust/src/day6.rs b/2022/Rust/src/day6.rs
new file mode 100644
index 0000000..b3afab6
--- /dev/null
+++ b/2022/Rust/src/day6.rs
@@ -0,0 +1,57 @@
+use std::collections::HashSet;
+
+fn solve_functional(data: &str, window: usize) -> usize {
+    data.as_bytes()
+        .windows(window)
+        .map(|arr| {
+            arr.into_iter()
+                .map(|ele| *ele as usize)
+                .collect::<HashSet<_>>()
+        })
+        .position(|set| set.len() == window)
+        .unwrap()
+        + window
+}
+
+fn solve_part_one(data: &str) -> usize {
+    let v: Vec<char> = data.chars().collect();
+    for i in 0..v.len() - 4 {
+        let mut st: HashSet<char> = HashSet::new();
+        for j in i..i + 4 {
+            st.insert(v[j]);
+        }
+        if st.len() == 4 {
+            return i + 4;
+        }
+    }
+    unreachable!()
+}
+
+fn solve_part_two(data: &str) -> usize {
+    let v: Vec<char> = data.chars().collect();
+    for i in 0..v.len() - 14 {
+        let mut st: HashSet<char> = HashSet::new();
+        for j in i..i + 14 {
+            st.insert(v[j]);
+        }
+        if st.len() == 14 {
+            return i + 14;
+        }
+    }
+    unreachable!()
+}
+
+fn main() {
+    let data_test = include_str!("../data/day6.test");
+    let data_prod = include_str!("../data/day6.prod");
+    println!("{}", solve_part_one(data_test));
+    println!("{}", solve_part_one(data_prod));
+    println!("{}", solve_part_two(data_test));
+    println!("{}", solve_part_two(data_prod));
+
+
+    println!("{}", solve_functional(data_test, 4));
+    println!("{}", solve_functional(data_prod, 4));
+    println!("{}", solve_functional(data_test, 14));
+    println!("{}", solve_functional(data_prod, 14));
+}