diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..2a6e744
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,11 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day01"
+version = "0.1.0"
+
+[[package]]
+name = "template"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 4c1c501..01c1e46 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 
 members = [
 	"template",
-#	"day01",
+	"day01",
 #	"day02",
 #	"day03",
 #	"day04",
diff --git a/day01/Cargo.toml b/day01/Cargo.toml
new file mode 100644
index 0000000..5a61072
--- /dev/null
+++ b/day01/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day01"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day01/input.txt b/day01/input.txt
new file mode 100644
index 0000000..80b734c
--- /dev/null
+++ b/day01/input.txt
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\ No newline at end of file
diff --git a/day01/src/main.rs b/day01/src/main.rs
new file mode 100644
index 0000000..708646d
--- /dev/null
+++ b/day01/src/main.rs
@@ -0,0 +1,87 @@
+use std::{fs, ops::Add};
+
+fn main() {
+  const FILE_PATH: &str = "input.txt";
+  println!(
+    "Welcome to AOC2023 day 1, first we will read the file {}",
+    FILE_PATH
+  );
+  let contents = fs::read_to_string(FILE_PATH).expect("Should have been able to read the file");
+
+  println!("And we parse the file!");
+  println!("First thing: {}", calculate(&parse(&contents)));
+  println!(
+    "Second thing: {}",
+    calculate(&parse(&text2digits(&contents)))
+  );
+}
+
+fn parse(input: &str) -> Vec<i32> {
+  input
+    .lines()
+    .map(|line| {
+      let digits = line.chars().filter(|c| c.is_digit(10)).collect::<Vec<_>>();
+      let len_digits = digits.len() - 1;
+      let number: String = digits[0].to_string().add(&digits[len_digits].to_string());
+      number.parse().expect("NAN")
+    })
+    .collect::<Vec<_>>()
+}
+
+const NUMTEXT: [(&str, &str); 12] = [
+  ("four", "4"),
+  ("seven", "7"),
+  ("e", "ee"),
+  ("nine", "9"),
+  ("five", "5"),
+  ("t", "tt"),
+  ("three", "3"),
+  ("eight", "8"),
+  ("o", "oo"),
+  ("one", "1"),
+  ("two", "2"),
+  ("six", "6"),
+];
+fn text2digits(input: &str) -> String {
+  input
+    .lines()
+    .map(|line| {
+      let mut line: String = line.to_string();
+      for (name, num) in NUMTEXT {
+        line = line.replacen(name, num, 99999);
+      }
+      line.add("\n")
+    })
+    .collect()
+}
+
+fn calculate(numbers: &Vec<i32>) -> i32 {
+  numbers.iter().sum()
+}
+
+#[cfg(test)]
+mod test {
+  const INPUT1: &str = r#"1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet"#;
+
+  const INPUT2: &str = r#"two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen"#;
+  use super::*;
+  #[test]
+  fn test1() {
+    let tst = parse(INPUT1);
+    assert_eq!(calculate(&tst), 142);
+  }
+  #[test]
+  fn test2() {
+    let tst = parse(&text2digits(INPUT2));
+    assert_eq!(calculate(&tst), 281);
+  }
+}