day one part two

one/Cargo.toml

@@ -3,6 +3,14 @@ name = "one"
 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]

one/output-two

@@ -0,0 +1 @@
+54418

one/src/two.rs

@@ -0,0 +1,36 @@
+use std::io::{self, Read};
+
+fn main() {
+    let mut buf = String::new();
+    io::stdin().read_to_string(&mut buf).unwrap();
+
+    let buf = buf.replace("twone", "twoone");
+    let buf = buf.replace("threeight", "threeeight");
+    let buf = buf.replace("oneight", "oneeight");
+    let buf = buf.replace("eightwo", "eighttwo");
+    let buf = buf.replace("eighthree", "eightthree");
+    let buf = buf.replace("nineight", "nineeight");
+    let buf = buf.replace("one", "1");
+    let buf = buf.replace("two", "2");
+    let buf = buf.replace("three", "3");
+    let buf = buf.replace("four", "4");
+    let buf = buf.replace("five", "5");
+    let buf = buf.replace("six", "6");
+    let buf = buf.replace("seven", "7");
+    let buf = buf.replace("eight", "8");
+    let buf = buf.replace("nine", "9");
+
+    let lines: Vec<String> = buf.lines().map(ToOwned::to_owned).collect();
+
+    let answer: Result<i32, _> = lines
+        .into_iter()
+        .map(|l| l.chars().filter(char::is_ascii_digit).collect())
+        .map(|s: String| [s.chars().next().unwrap(), s.chars().last().unwrap()].to_owned())
+        .map(String::from_iter)
+        .map(|s| s.parse::<i32>())
+        .sum();
+
+    let answer = answer.unwrap();
+
+    print!("{answer}");
+}