Day Three

3 files changed, 58 insertions, 0 deletions

diff --git a/2022/rust/day03/Cargo.lock b/2022/rust/day03/Cargo.lock
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+++ b/2022/rust/day03/Cargo.lock
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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day03"
+version = "0.1.0"
diff --git a/2022/rust/day03/Cargo.toml b/2022/rust/day03/Cargo.toml
new file mode 100644
index 0000000..2804bab
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+++ b/2022/rust/day03/Cargo.toml
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+[package]
+name = "day03"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2022/rust/day03/src/main.rs b/2022/rust/day03/src/main.rs
new file mode 100644
index 0000000..db5b83e
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+++ b/2022/rust/day03/src/main.rs
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+#![feature(iter_array_chunks)]
+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 rucksacks = input.trim().split("\n");
+
+    let compartments: Vec<(&str, &str)> = rucksacks.clone()
+        .map(|x| x.split_at(x.len() / 2)).collect();
+    let mut sum = 0;
+    for (a, b) in compartments.iter() {
+        for c in a.chars() {
+            if b.contains(c) {
+                sum += deascii(c);
+                break;
+            }
+        }
+        // println!("{:?}, {:?}", a, b);
+    }
+    println!("{}", sum);
+
+    sum = 0;
+    // yoo this is sick
+    for a in rucksacks.array_chunks::<3>() {
+        for c in a[0].chars() {
+            if a[1].contains(c) && a[2].contains(c) {
+                sum += deascii(c);
+                break;
+            }
+        }
+    }
+    println!("{}", sum);
+}
+
+fn deascii(x: char) -> i64 {
+    if x as i64 > 96 {
+        return x as i64 - 96;
+    } else {
+        return x as i64 - 38;
+    }
+}