Day 2

src/bin/02_1.rs

@@ -0,0 +1,38 @@
+use std::fs;
+
+use anyhow::Result;
+
+
+fn main() -> Result<()> {
+    let input = fs::read_to_string("input/02.txt")?;
+
+    let score: i32 = input
+        .split("\n")
+        .collect::<Vec<&str>>()
+        .into_iter()
+        .filter(|s| *s != "")
+        .map(|s| s.split(" "))
+        .map(|mut s| (s.next().expect(""), s.next().expect("")))
+        .map(map_move_to_score)
+        .sum();
+
+    println!("{score}");
+
+    return Ok(())
+}
+
+// ABC XYZ
+fn map_move_to_score(action: (&str, &str)) -> i32 {
+    return match action {
+        ("A", "X") => 4,
+        ("A", "Y") => 8,
+        ("A", "Z") => 3,
+        ("B", "X") => 1,
+        ("B", "Y") => 5,
+        ("B", "Z") => 9,
+        ("C", "X") => 7,
+        ("C", "Y") => 2,
+        ("C", "Z") => 6,
+        (_, _) => 0,
+    };
+}

src/bin/02_2.rs

@@ -0,0 +1,38 @@
+use std::fs;
+
+use anyhow::Result;
+
+
+fn main() -> Result<()> {
+    let input = fs::read_to_string("input/02.txt")?;
+
+    let score: i32 = input
+        .split("\n")
+        .collect::<Vec<&str>>()
+        .into_iter()
+        .filter(|s| *s != "")
+        .map(|s| s.split(" "))
+        .map(|mut s| (s.next().expect(""), s.next().expect("")))
+        .map(map_move_to_score)
+        .sum();
+
+    println!("{score}");
+
+    return Ok(())
+}
+
+// ABC XYZ
+fn map_move_to_score(action: (&str, &str)) -> i32 {
+    return match action {
+        ("A", "X") => 0 + 3,
+        ("A", "Y") => 3 + 1,
+        ("A", "Z") => 6 + 2,
+        ("B", "X") => 0 + 1,
+        ("B", "Y") => 3 + 2,
+        ("B", "Z") => 6 + 3,
+        ("C", "X") => 0 + 2,
+        ("C", "Y") => 3 + 3,
+        ("C", "Z") => 6 + 1,
+        (_, _) => 0,
+    };
+}