day three part one

three/.gitignore

@@ -0,0 +1 @@
+target/

three/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "three"
+version = "0.1.0"

three/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "three"
+version = "0.1.0"
+edition = "2021"
+
+[[bin]]
+name = "pone"
+path = "src/one.rs"
+
+# [[bin]]
+# name = "ptwo"
+# path = "src/two.rs"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

three/input

@@ -0,0 +1,140 @@
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three/output-one

@@ -0,0 +1 @@
+532428

three/src/one.rs

@@ -0,0 +1,93 @@
+use std::io::{self, Read};
+
+fn main() {
+    let mut buf = String::new();
+    io::stdin().read_to_string(&mut buf).unwrap();
+
+    let mut lines: Vec<String> = buf.lines().map(ToOwned::to_owned).collect();
+
+    let line_number_indecies: Vec<_> = lines.iter().map(get_numbers).collect();
+
+    // tuple of the line number and character indexes for our list of lines
+    let numbers = line_number_indecies
+        .iter()
+        .enumerate()
+        .flat_map(|(line, idxs)| {
+            idxs.iter()
+                .map(AsRange::as_range)
+                .zip(std::iter::repeat(line))
+        });
+
+    for (positions, line) in numbers.clone() {
+        cull_noise(&mut lines, line, positions);
+    }
+
+    let total: usize = numbers
+        .map(|(positions, line)| &lines[line][positions])
+        .flat_map(str::parse::<usize>)
+        .sum();
+
+    print!("{total}");
+}
+
+fn get_numbers<S>(s: S) -> Vec<(usize, usize)>
+where
+    S: AsRef<str>,
+{
+    let s = s.as_ref();
+
+    let mut number_indecies = Vec::new();
+
+    let mut idx = 0;
+    while idx < s.len() {
+        if s.chars().nth(idx).unwrap().is_ascii_digit() {
+            let start_index = idx;
+            while idx < s.len() && s.chars().nth(idx).unwrap().is_ascii_digit() {
+                idx += 1;
+            }
+            let end_index = idx;
+
+            number_indecies.push((start_index, end_index));
+        } else {
+            idx += 1;
+        }
+    }
+
+    number_indecies
+}
+
+trait AsRange {
+    fn as_range(&self) -> std::ops::Range<usize>;
+}
+
+impl AsRange for (usize, usize) {
+    fn as_range(&self) -> std::ops::Range<usize> {
+        self.0..self.1
+    }
+}
+
+fn cull_noise(source: &mut Vec<String>, line: usize, positions: std::ops::Range<usize>) {
+    let mut symbol_flag = false;
+    for line in clamp_range(fuzz_range(line..line + 1), source.len()) {
+        for position in clamp_range(fuzz_range(positions.clone()), source[line].len()) {
+            match source[line].chars().nth(position).unwrap() {
+                '.' | '0'..='9' => (),
+                _ => symbol_flag = true,
+            }
+        }
+    }
+
+    if !symbol_flag {
+        source[line].replace_range(positions.clone(), &".".repeat(positions.len()))
+    }
+}
+
+fn clamp_range(input: std::ops::Range<usize>, max: usize) -> std::ops::Range<usize> {
+    let end = if input.end > max { max } else { input.end };
+
+    input.start..end
+}
+
+fn fuzz_range(input: std::ops::Range<usize>) -> std::ops::Range<usize> {
+    input.start.checked_sub(1).unwrap_or(input.start)..input.end + 1
+}

three/src/two.rs

@@ -0,0 +1,8 @@
+use std::io::{self, Read};
+
+fn main() {
+    let mut buf = String::new();
+    io::stdin().read_to_string(&mut buf).unwrap();
+
+    let lines: Vec<String> = buf.lines().map(ToOwned::to_owned).collect();
+}