day 01

.gitignore

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+/target
+/input

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc2022"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "aoc2022"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

README.md

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 # Advent of Code 2022
 
+WARNING: ADVENT OF CODE SPOILERS AHEAD
 
+solutions located in the `examples` directory. run with `cargo r --example=day##_#.rs`. input is given via stdin.

examples/day01_1.rs

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+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let lines = std::io::stdin().lines();
+    let mut max = 0;
+    let mut elf = 0;
+    for line in lines {
+        let line = line?;
+        if line.trim().is_empty() {
+            max = max.max(elf);
+            elf = 0;
+        } else {
+            elf += line.parse::<i32>()?;
+        }
+    }
+    println!("{}", max);
+    Ok(())
+}

examples/day01_2.rs

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+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let lines = std::io::stdin().lines();
+    let mut elves = Vec::new();
+    let mut elf = 0;
+    for line in lines {
+        let line = line?;
+        if line.trim().is_empty() {
+            elves.push(elf);
+            elf = 0;
+        } else {
+            elf += line.parse::<i32>()?;
+        }
+    }
+    elves.sort();
+    elves.reverse();
+    println!("{}", elves[0] + elves[1] + elves[2]);
+    Ok(())
+}