From 00000180b3708c958de5803aaf6fe1dbc81797bc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matej=20Jane=C5=BEi=C4=8D?= <janezic.mj@gmail.com>
Date: Sun, 4 Dec 2022 19:42:40 +0100
Subject: [PATCH] solution: day10

---
 src/bin/10.rs          | 54 ++++++++++++++++++++++++++++++++++++++++++
 src/lib.rs             |  2 +-
 src/test_inputs/10.txt |  1 +
 3 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 src/bin/10.rs
 create mode 100644 src/test_inputs/10.txt

diff --git a/src/bin/10.rs b/src/bin/10.rs
new file mode 100644
index 000000000..152dc85
--- /dev/null
+++ b/src/bin/10.rs
@@ -0,0 +1,54 @@
+fn process(s: &str) -> String {
+    let mut new_s = String::new();
+    let mut count = 0;
+    let mut current = s.chars().next().unwrap();
+
+    for c in s.chars() {
+        if c == current {
+            count += 1;
+        } else {
+            new_s.push_str(&count.to_string());
+            new_s.push(current);
+            current = c;
+            count = 1
+        }
+    }
+
+    new_s.push_str(&count.to_string());
+    new_s.push(current);
+    new_s
+}
+
+pub fn part_one(input: &str) -> Option<u32> {
+    let mut res = input.to_string();
+    for _ in 0..40 {
+        res = process(&res);
+    }
+    Some(res.len() as u32)
+}
+pub fn part_two(input: &str) -> Option<u32> {
+    let mut res = input.to_string();
+    for _ in 0..50 {
+        res = process(&res);
+    }
+    Some(res.len() as u32)
+}
+fn main() {
+    let input = &aoc::read_file("inputs", 10);
+    aoc::solve!(1, part_one, input);
+    aoc::solve!(2, part_two, input);
+}
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_part_one() {
+        let input = aoc::read_file("test_inputs", 10);
+        assert_eq!(part_one(&input), Some(124496));
+    }
+    #[test]
+    fn test_part_two() {
+        let input = aoc::read_file("test_inputs", 10);
+        assert_eq!(part_two(&input), Some(1766402));
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index a789162..70e577e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -21,7 +21,7 @@ macro_rules! solve {
 
         fn print_result<T: Display>(func: impl FnOnce(&str) -> Option<T>, input: &str) {
             let timer = Instant::now();
-            let result = func(input);
+            let result = func(input.trim());
             let elapsed = timer.elapsed();
             match result {
                 Some(result) => {
diff --git a/src/test_inputs/10.txt b/src/test_inputs/10.txt
new file mode 100644
index 000000000..d00491f
--- /dev/null
+++ b/src/test_inputs/10.txt
@@ -0,0 +1 @@
+1