omg I did day 3

src/day3.rs

@@ -0,0 +1,83 @@
+use std::{fs, vec};
+
+use itertools::Itertools;
+use regex::Regex;
+
+pub fn run() {
+    println!("Day 1:");
+    let input = fs::read_to_string("./inputs/day3.txt").expect("Could not read file");
+
+    println!("\tPart 1: {}", part1(&input));
+    // println!("\tPart 2: {}", part2(&input));
+}
+
+fn part1(schematic: &str) -> usize {
+    let mut sum_of_parts = 0;
+    let padded_schematic = format!(".\n{schematic}\n.");
+    let re = Regex::new(r"\d+").unwrap();
+    let windows = padded_schematic
+        .lines()
+        .tuple_windows::<(_, _, _)>()
+        .collect::<Vec<_>>();
+    for (top, middle, bottom) in windows {
+        for number in re.find_iter(middle) {
+            let search_range = std::ops::Range {
+                start: number.range().start.saturating_sub(1),
+                end: number.range().end + 1,
+            };
+
+            let mut search_values: Vec<char> = vec![];
+            for index in search_range {
+                search_values.push(top.chars().nth(index).unwrap_or('.'));
+                search_values.push(middle.chars().nth(index).unwrap_or('.'));
+                search_values.push(bottom.chars().nth(index).unwrap_or('.'));
+            }
+            if search_values
+                .into_iter()
+                .filter(|c| !c.is_ascii_digit())
+                .filter(|c| c != &'.')
+                .count()
+                != 0
+            {
+                sum_of_parts += number.as_str().parse::<usize>().unwrap();
+            }
+        }
+    }
+    sum_of_parts
+}
+
+// fn part2(calibration_input: &str) -> usize {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_1() {
+        let input = "467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..";
+
+        assert_eq!(part1(input), 4361);
+    }
+
+    //     #[test]
+    //     fn test_2() {
+    //         let input = "two1nine
+    // eightwothree
+    // abcone2threexyz
+    // xtwone3four
+    // 4nineeightseven2
+    // zoneight234
+    // 7pqrstsixteen";
+
+    //         assert_eq!(part2(input), 281);
+    //     }
+}

src/main.rs

@@ -3,9 +3,11 @@ extern crate scan_fmt;
 
 mod day1;
 mod day2;
+mod day3;
 
 fn main() {
     println!("Running Advent of Code 2023");
     day1::run();
     day2::run();
+    day3::run();
 }