Day Two

1 files changed, 52 insertions, 0 deletions

diff --git a/2022/rust/day02/src/main.rs b/2022/rust/day02/src/main.rs
new file mode 100644
index 0000000..fe1494f
--- /dev/null
+++ b/2022/rust/day02/src/main.rs
@@ -0,0 +1,52 @@
+use std::env;
+use std::fs;
+
+fn main() {
+    let args = env::args().nth(1).expect("missing input");
+    let input = fs::read_to_string(args).unwrap();
+    let moves = input.trim().split("\n").map(|x| {
+        let mut vec = x.split(" ");
+        return (vec.next().unwrap(), vec.next().unwrap());
+    }).collect::<Vec<(&str, &str)>>();
+
+    let mut sum = 0;
+    // note: without the iter "moves" is implicitly moved into the loop
+    for i in moves.iter() {
+        match i {
+            // (x, "X") => sum += 1,
+            ("A", "X") => sum += 3 + 1,
+            ("B", "X") => sum += 0 + 1,
+            ("C", "X") => sum += 6 + 1,
+            // (x, "Y") => sum += 2,
+            ("A", "Y") => sum += 6 + 2,
+            ("B", "Y") => sum += 3 + 2,
+            ("C", "Y") => sum += 0 + 2,
+            // (x, "Z") => sum += 3,
+            ("A", "Z") => sum += 0 + 3,
+            ("B", "Z") => sum += 6 + 3,
+            ("C", "Z") => sum += 3 + 3,
+            _ => ()
+        }
+    }
+    println!("{}", sum);
+
+    sum = 0;
+    for i in moves.iter() {
+        match i {
+            // (x, "X") => sum += 1,
+            ("A", "X") => sum += 3 + 0,
+            ("B", "X") => sum += 1 + 0,
+            ("C", "X") => sum += 2 + 0,
+            // (x, "Y") => sum += 2,
+            ("A", "Y") => sum += 1 + 3,
+            ("B", "Y") => sum += 2 + 3,
+            ("C", "Y") => sum += 3 + 3,
+            // (x, "Z") => sum += 3,
+            ("A", "Z") => sum += 2 + 6,
+            ("B", "Z") => sum += 3 + 6,
+            ("C", "Z") => sum += 1 + 6,
+            _ => ()
+        }
+    }
+    println!("{}", sum);
+}