From eefb16d5bef8c04038ea3ac1b8a8c06066c6faea Mon Sep 17 00:00:00 2001
From: kageru <kageru@encode.moe>
Date: Fri, 1 Dec 2023 07:00:46 +0100
Subject: [PATCH] add 2023/01

---
 2023/Cargo.toml       |    2 +
 2023/inputs/day01     | 1000 +++++++++++++++++++++++++++++++++++++++++
 2023/src/bin/day01.rs |   63 +++
 3 files changed, 1065 insertions(+)
 create mode 100644 2023/inputs/day01
 create mode 100644 2023/src/bin/day01.rs

diff --git a/2023/Cargo.toml b/2023/Cargo.toml
index fc1117b..25340ba 100644
--- a/2023/Cargo.toml
+++ b/2023/Cargo.toml
@@ -4,6 +4,8 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+fnv = "1.0.7"
+impl_ops = "0.1.1"
 itertools = "0.12"
 paste = "1.0"
 
diff --git a/2023/inputs/day01 b/2023/inputs/day01
new file mode 100644
index 0000000..e5fe23b
--- /dev/null
+++ b/2023/inputs/day01
@@ -0,0 +1,1000 @@
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diff --git a/2023/src/bin/day01.rs b/2023/src/bin/day01.rs
new file mode 100644
index 0000000..3c68fd2
--- /dev/null
+++ b/2023/src/bin/day01.rs
@@ -0,0 +1,63 @@
+#![feature(test)]
+extern crate test;
+use aoc2023::{boilerplate, common::*};
+
+const DAY: usize = 1;
+type Parsed<'a> = Vec<&'a str>;
+
+fn parse_input(raw: &str) -> Parsed<'_> {
+    raw.lines().collect()
+}
+
+fn part1(parsed: &Parsed) -> usize {
+    parsed
+        .iter()
+        .map(|l| {
+            let l: Vec<_> = l.bytes().filter_map(|b| b.is_ascii_digit().then_some((b - b'0') as usize)).collect();
+            l[0] * 10 + l.last().unwrap()
+        })
+        .sum()
+}
+
+const DIGITS: [&str; 9] = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
+
+fn find_digit(s: &str) -> Option<usize> {
+    if s.as_bytes()[0].is_ascii_digit() {
+        return Some((s.as_bytes()[0] - b'0') as usize);
+    }
+    DIGITS.iter().zip(1usize..).find_map(|(&d, i)| s.starts_with(d).then_some(i))
+}
+
+fn part2(parsed: &Parsed) -> usize {
+    parsed
+        .iter()
+        .map(|l| {
+            let first = (0..l.len()).find_map(|s| find_digit(&l[s..])).unwrap();
+            let last = (0..l.len()).rev().find_map(|s| find_digit(&l[s..])).unwrap();
+            first * 10 + last
+        })
+        .sum()
+}
+
+#[cfg(test)]
+const TEST_INPUT_2: &str = "two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen";
+
+boilerplate! {
+    TEST_INPUT == "1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet",
+    tests: {
+        part1: { TEST_INPUT => 142 },
+        part2: { TEST_INPUT_2 => 281 },
+    },
+    bench1 == 54916,
+    bench2 == 54728,
+    bench_parse: Vec::len => 1000,
+}