2022, day3: done

1 files changed, 24 insertions, 0 deletions

diff --git a/2022/day3/part1/src/main.rs b/2022/day3/part1/src/main.rs
new file mode 100644
index 0000000..2de2ce8
--- /dev/null
+++ b/2022/day3/part1/src/main.rs
@@ -0,0 +1,24 @@
+use std::collections::HashSet;
+
+fn main() {
+    let rucksacks: Vec<(&str, &str)> = include_str!("../../input")
+        .lines()
+        .map(|line| line.split_at(line.len() / 2))
+        .collect();
+
+    let mut sum = 0;
+    for (f, s) in rucksacks {
+        let first: HashSet<char> = HashSet::from_iter(f.chars());
+        let second: HashSet<char> = HashSet::from_iter(s.chars());
+
+        for x in first.intersection(&second) {
+            if x.is_lowercase() {
+                sum += *x as i16 - 96;
+            } else {
+                sum += *x as i16 - 38;
+            }
+        }
+    }
+
+    println!("{}", sum);
+}