Added 2022, first few problems

3 files changed, 36 insertions, 0 deletions

diff --git a/2022/02/a.rs b/2022/02/a.rs
new file mode 100644
index 0000000..1a49a6b
--- /dev/null
+++ b/2022/02/a.rs
@@ -0,0 +1,13 @@
+mod common;
+use common::*;
+
+pub fn main() {
+    let play_score = |s: &[u8]| (s[2] as i64) - ('X' as i64) + 1;
+    let win_score = |s: &[u8]| {
+        let other = s[0] as i64 - ('A' as i64);
+        let me = s[2] as i64 - ('X' as i64);
+        3 * ((me - other + 4) % 3)
+    };
+    let score = get_score(play_score, win_score);
+    println!("{score}");
+}
diff --git a/2022/02/b.rs b/2022/02/b.rs
new file mode 100644
index 0000000..9f2b580
--- /dev/null
+++ b/2022/02/b.rs
@@ -0,0 +1,13 @@
+mod common;
+use common::*;
+
+pub fn main() {
+    let play_score = |s: &[u8]| {
+        let other = s[0] as i64 - ('A' as i64);
+        let w = s[2] as i64 - ('X' as i64);
+        (other + w + 2) % 3 + 1
+    };
+    let win_score = |s: &[u8]| 3 * ((s[2] as i64) - ('X' as i64));
+    let score = get_score(play_score, win_score);
+    println!("{score}");
+}
diff --git a/2022/02/common.rs b/2022/02/common.rs
new file mode 100644
index 0000000..04581cf
--- /dev/null
+++ b/2022/02/common.rs
@@ -0,0 +1,10 @@
+pub fn get_score(play_score: fn(&[u8]) -> i64, win_score: fn(&[u8]) -> i64) -> i64 {
+    let mut score = 0;
+    let mut line = String::new();
+    while std::io::stdin().read_line(&mut line).unwrap() > 0 {
+        let l = line.as_bytes();
+        score += play_score(l) + win_score(l);
+        line.clear();
+    }
+    score
+}