Part 1

2022/rust/src/day2.rs

@@ -1,13 +1,59 @@
 mod common;
 
+// A -> Rock
+// B -> Paper
+// C -> Scissors
+
+// X -> Rock -> 1
+// Y -> Paper -> 2
+// Z -> Scissors -> 3
+
 fn main() {
     let input = common::day_input(2);
     println!("Part 1: {}", part1(&input));
     println!("Part 2: {}", part2(&input));
 }
 
+fn rps(a: char, b: char) -> i32 {
+    match b {
+        'X' => {
+            1 + match a {
+                'A' => 3,
+                'B' => 0,
+                'C' => 6,
+                _ => 1000000,
+            }
+        }
+        'Y' => {
+            2 + match a {
+                'A' => 6,
+                'B' => 3,
+                'C' => 0,
+                _ => 1000000,
+            }
+        }
+        'Z' => {
+            3 + match a {
+                'A' => 0,
+                'B' => 6,
+                'C' => 3,
+                _ => 1000000,
+            }
+        }
+        _ => 1000000,
+    }
+}
+
 fn part1(input: &str) -> i32 {
-    0
+    input
+        .lines()
+        .map(|s| {
+            println!("{:?}", s);
+            println!("{:?}", s.chars().nth(2));
+            let mut c = s.chars();
+            rps(c.nth(0).unwrap(), c.nth(1).unwrap())
+        })
+        .sum()
 }
 
 fn part2(input: &str) -> i32 {
@@ -18,15 +64,17 @@ fn part2(input: &str) -> i32 {
 mod tests {
     use super::*;
 
-    const TEST_INPUT: &str = "0";
+    const TEST_INPUT: &str = "A Y
+B X
+C Z";
 
     #[test]
     fn test_part1() {
-        assert_eq!(part1(TEST_INPUT), 10000)
+        assert_eq!(part1(TEST_INPUT), 15)
     }
 
-    #[test]
-    fn test_part2() {
-        assert_eq!(part2(TEST_INPUT), 10000)
-    }
+    // #[test]
+    // fn test_part2() {
+    //     assert_eq!(part2(TEST_INPUT), 10000)
+    // }
 }