From c0c5909c17a985cf8376d06270afb8d6805605ab Mon Sep 17 00:00:00 2001
From: Julio Biason <j.biason@engys.com>
Date: Wed, 7 Dec 2022 10:09:01 -0300
Subject: [PATCH] Day 1

---
 .gitignore         |    1 +
 README.md          |    2 +-
 day1/Cargo.lock    |  231 +++++
 day1/Cargo.toml    |    9 +
 day1/calories.prod | 2256 ++++++++++++++++++++++++++++++++++++++++++++
 day1/calories.test |   14 +
 day1/src/main.rs   |   37 +
 7 files changed, 2549 insertions(+), 1 deletion(-)
 create mode 100644 .gitignore
 create mode 100644 day1/Cargo.lock
 create mode 100644 day1/Cargo.toml
 create mode 100644 day1/calories.prod
 create mode 100644 day1/calories.test
 create mode 100644 day1/src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9561e41
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+**/target/**
diff --git a/README.md b/README.md
index 36f2309..696143c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # AoC-2022
 
-Advent of Code 2022 
\ No newline at end of file
+Advent of Code 2022.
diff --git a/day1/Cargo.lock b/day1/Cargo.lock
new file mode 100644
index 0000000..10dc82e
--- /dev/null
+++ b/day1/Cargo.lock
@@ -0,0 +1,231 @@
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new file mode 100644
index 0000000..c3d6e43
--- /dev/null
+++ b/day1/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
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diff --git a/day1/calories.test b/day1/calories.test
new file mode 100644
index 0000000..2094f91
--- /dev/null
+++ b/day1/calories.test
@@ -0,0 +1,14 @@
+1000
+2000
+3000
+
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000
diff --git a/day1/src/main.rs b/day1/src/main.rs
new file mode 100644
index 0000000..ceda7ac
--- /dev/null
+++ b/day1/src/main.rs
@@ -0,0 +1,37 @@
+use std::fs::File;
+use std::io::BufRead;
+use std::io::BufReader;
+
+use clap::Arg;
+use clap::Command;
+
+fn main() {
+    let matches = Command::new("Day1").arg(Arg::new("filename")).get_matches();
+    let filename = matches
+        .get_one::<String>("filename")
+        .expect("Need a filename");
+    println!("Processing {}...", filename);
+
+    let file = File::open(filename).expect("Can't read file");
+    let reader = BufReader::new(file);
+
+    let mut max_calories = 0;
+    let mut elf_calories = 0;
+
+    for line in reader.lines() {
+        let line = line.unwrap();
+        let line = line.trim();
+
+        // XXX I want to do this with an iterator!
+        if line.is_empty() {
+            if elf_calories > max_calories {
+                max_calories = elf_calories;
+            }
+            elf_calories = 0;
+        } else {
+            println!("Line: {}", line);
+            elf_calories += line.parse::<u32>().unwrap();
+        }
+    }
+    println!("Max: {}", max_calories);
+}