1 files changed, 44 insertions, 0 deletions
diff --git a/2023/day-01/src/bin/part1.rs b/2023/day-01/src/bin/part1.rs
new file mode 100644
index 0000000..3fd213d
--- /dev/null
+++ b/2023/day-01/src/bin/part1.rs
@@ -0,0 +1,44 @@
+fn main() {
+    let input = include_str!("./input.txt");
+    let output: u32 = input.lines().map(process_line).sum();
+    println!("Result {}", output);
+}
+
+fn process_line(s: &str) -> u32 {
+    let mut string = String::new();
+    let iter: Vec<char> = s.chars().filter(|c| {
+        c.to_digit(10).is_some()
+    }).map(|c| c).collect();
+    assert!(iter.len() >= 1);
+    let chars = [iter.first(), iter.last()];
+    for char in chars {
+	if let Some(c) = char {
+            string.push(*c);
+	}
+    }
+    string.parse::<u32>().unwrap()
+}
+
+#[test]
+fn input_1() {
+    let result = process_line("1abc2");
+    assert_eq!(result, 12);
+}
+
+#[test]
+fn input_2() {
+    let result = process_line("pqr3stu8vwx");
+    assert_eq!(result, 38);
+}
+
+#[test]
+fn input_3() {
+    let result = process_line("a1b2c3d4e5f");
+    assert_eq!(result, 15);
+}
+
+#[test]
+fn input_4() {
+    let result = process_line("treb7uchet");
+    assert_eq!(result, 77);
+}