day 11 pt 1 broken

data/examples/11.txt

@@ -0,0 +1 @@
+0 1 10 99 999

src/bin/11.rs

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+use std::ops::{Div, Mul};
+
+use itertools::Itertools;
+
+advent_of_code::solution!(11);
+
+pub fn part_one(input: &str) -> Option<u32> {
+    let mut stones = input.strip_suffix("\n")?.split(" ").collect_vec();
+
+    for step in 0..25 {
+        println!("STEP {step}: {:?}", stones);
+        // stones.clone_from(&process_stones(stones).iter().map(|s| s as &str).collect_vec());
+        // stones = next_step.clone().iter().map(|s| s as &str).collect_vec();
+        for idx in (0..stones.len()).rev() {
+            let stone = stones[idx];
+            let stone_length = stone.len();
+            if stone == "0" {
+                stones[idx] = "1";
+            } else if stone_length % 2 == 0 {
+                let stone_iter = stone.chars().into_iter();
+                // THIS IS BROKEN AND I"M VERY SAD
+                let first_half = stone_iter.by_ref().take(stone_length/2).collect::<String>().as_str();
+
+                let second_half = stone.chars().into_iter().skip(stone_length/2).take(stone_length/2).collect::<String>().as_str();
+                stones[idx] = first_half;
+                stones.insert(idx + 1, second_half);
+            } else {
+                stones[idx] = stone.parse::<usize>().unwrap().mul(2024).to_string().as_str();
+            }
+        }
+    }
+
+    println!("FINAL STONES: {:?}", stones);
+    None
+}
+
+pub fn part_two(input: &str) -> Option<u32> {
+    None
+}
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        let result = part_one(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, Some(55312));
+    }
+
+    #[test]
+    fn test_part_two() {
+        let result = part_two(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, None);
+    }
+}