From 1a5b2ddfdd7a173b66d3eb0ec5780106a5af4836 Mon Sep 17 00:00:00 2001
From: jazzpi <jasper@mezzo.de>
Date: Mon, 12 Dec 2022 19:51:33 +0100
Subject: [PATCH] Day 1, puzzle 1

---
 .gitignore  |  1 +
 Cargo.lock  |  7 +++++++
 Cargo.toml  | 12 ++++++++++++
 src/d1p1.rs | 28 ++++++++++++++++++++++++++++
 4 files changed, 48 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/d1p1.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..6da112f
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc23"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..1ce86a9
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "aoc23"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[[bin]]
+name = "d1p1"
+path = "src/d1p1.rs"
diff --git a/src/d1p1.rs b/src/d1p1.rs
new file mode 100644
index 0000000..c285b36
--- /dev/null
+++ b/src/d1p1.rs
@@ -0,0 +1,28 @@
+use std::io;
+
+fn main() {
+    println!("What's the calorie list?");
+    let lines = io::stdin().lines();
+    let mut was_empty = false;
+    let mut elves = vec![0];
+    for line in lines {
+        let line_s = line.unwrap();
+        if line_s.is_empty() {
+            if was_empty {
+                break;
+            }
+            elves.push(0);
+            was_empty = true;
+            continue;
+        } else {
+            was_empty = false;
+        }
+
+        let calories: u32 = line_s.parse().expect("Wanted a number");
+        let prev_calories = elves.pop().unwrap();
+        elves.push(prev_calories + calories);
+    }
+
+    let max = elves.iter().max().unwrap();
+    println!("The elf with the most calories is carrying {} cal", max);
+}