1 files changed, 74 insertions, 0 deletions
diff --git a/02/src/part-2.rs b/02/src/part-2.rs
new file mode 100644
index 0000000..2c6e146
--- /dev/null
+++ b/02/src/part-2.rs
@@ -0,0 +1,74 @@
+// TODO: This should of course all be table lookups instead of nested switches.
+
+use std::io::{BufRead};
+
+fn main() {
+    let stdin = std::io::stdin();
+    let handle = stdin.lock();
+
+    let rock: usize = 1;
+    let paper: usize = 2;
+    let scissors: usize = 3;
+    let lose: usize = 0;
+    let draw: usize = 3;
+    let win: usize = 6;
+    
+    let mut score: usize = 0;
+   
+    for l in handle.lines() {
+        let line = l.unwrap();
+        let mut chars = line.chars();
+        let opponent_move = chars.next().unwrap();
+        assert_eq!(chars.next().unwrap(), ' ');
+        let my_move = chars.next().unwrap();
+        
+        score += match opponent_move {
+            'A' => { // Opponent plays rock.
+                match my_move {
+                    'X' => { // We need to lose, play scissors.
+                        lose + scissors
+                    },
+                    'Y' => { // We need to draw, play rock.
+                        draw + rock
+                    },
+                    'Z' => { // We need to win, play paper
+                        win + paper
+                    },
+                    _ => panic!("Unreachable")
+                }
+            },
+            'B' => { // Opponent plays paper.
+                match my_move {
+                    'X' => { // We need to lose, play rock.
+                        lose + rock
+                    },
+                    'Y' => { // We need to draw, play paper.
+                        draw + paper
+                    },
+                    'Z' => { // We need to win, play scissors
+                        win + scissors
+                    },
+                    _ => panic!("Unreachable")
+                }
+            },
+            'C' => { // Opponent plays scissors.
+                match my_move {
+                    'X' => { // We need to lose, play paper.
+                        lose + paper
+                    },
+                    'Y' => { // We need to draw, play scissors.
+                        draw + scissors
+                    },
+                    'Z' => { // We need to win, play rock
+                        win + rock
+                    },
+                    _ => panic!("Unreachable")
+                }
+            },
+            _ => panic!("Unreachable")
+        };
+    }
+
+    println!("Total score: {}", score);
+    
+}