commit b9dfa6ab29479b3472f457fa14e06bd576249165
Author: pjht <pterpstra@pterpstra.com>
Date:   Fri Dec 1 20:50:14 2023 -0600

    Day 1 initial solution

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4fffb2f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..cc32e4f
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "aoc2023"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+aoc-runner = "0.3.0"
+aoc-runner-derive = "0.3.0"
+nom = "7.1.3"
diff --git a/input/2023/day1.txt b/input/2023/day1.txt
new file mode 100644
index 0000000..495c9b2
--- /dev/null
+++ b/input/2023/day1.txt
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diff --git a/src/day01.rs b/src/day01.rs
new file mode 100644
index 0000000..22cd6e2
--- /dev/null
+++ b/src/day01.rs
@@ -0,0 +1,55 @@
+use aoc_runner_derive::{aoc, aoc_generator};
+use nom::{IResult, bytes::complete::tag, combinator::{map, opt}, branch::alt, character::complete::satisfy, Finish};
+
+#[aoc_generator(day1)]
+fn input_generator(input: &str) -> Vec<String> {
+    input.split('\n').map(|line| line.to_string()).collect()
+}
+
+#[aoc(day1, part1)]
+fn part1(input: &[String]) -> u32 {
+    input.iter().map(|line| {
+        line.chars()
+            .filter(|c| c.is_ascii_digit())
+            .map(|c| (c as u32) - (b'0' as u32))
+            .collect::<Vec<_>>()
+    }).map(|line| (line[0] * 10) + (line.last().unwrap())).sum()
+}
+
+fn parse_text_digit(input: &str) -> IResult<&str, u32> {
+   let one = map(tag("one"), |_| 1);
+   let two = map(tag("two"), |_| 2);
+   let three = map(tag("three"), |_| 3);
+   let four = map(tag("four"), |_| 4);
+   let five = map(tag("five"), |_| 5);
+   let six = map(tag("six"), |_| 6);
+   let seven = map(tag("seven"), |_| 7);
+   let eight = map(tag("eight"), |_| 8);
+   let nine = map(tag("nine"), |_| 9);
+   alt((one, two, three, four, five, six, seven, eight, nine))(input)
+}
+
+fn parse_ascii_digit(input: &str) -> IResult<&str, u32> {
+    map(satisfy(|c| c.is_ascii_digit()), |c| (c as u32) - (b'0' as u32))(input)
+}
+
+fn parse_digit(input: &str) -> IResult<&str, u32> {
+    alt((parse_text_digit, parse_ascii_digit))(input)
+}
+
+fn parse_line(line: &str) -> Vec<u32> {
+    let mut digits = Vec::new();
+    let mut line = line;
+    while line.len() > 0 {
+        if let (_, Some(digit)) = opt(parse_digit)(line).finish().unwrap() {
+            digits.push(digit);
+        }
+        line = &line[1..];
+    }
+    digits
+}
+
+#[aoc(day1, part2)]
+fn part2(input: &[String]) -> u32 {
+    input.iter().map(|line| parse_line(line)).map(|line| (line[0] * 10) + (line.last().unwrap())).sum()
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..55cd818
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,5 @@
+use aoc_runner_derive::aoc_lib;
+
+mod day01;
+
+aoc_lib! { year = 2023 }