Solve 2025 day 1 part 2 in rust

2025/rust/day-01/src/main.rs

@@ -1,12 +1,13 @@
 use std::fs::{self};
 
 fn main() {
-    let rotations = read_input();
+    let rotations = read_rotations();
 
-    println!("Password: {}", count_neutral_positions(rotations));
+    println!("Password1: {}", count_zero_positions(&rotations));
+    println!("Password2: {}", count_zero_clicks(&rotations));
 }
 
-fn read_input() -> Vec<i32> {
+fn read_rotations() -> Vec<i32> {
     let contents = fs::read_to_string("../../inputs/01.txt").unwrap();
     let lines = contents.lines();
 
@@ -18,7 +19,7 @@ fn read_input() -> Vec<i32> {
         let distance = distance.parse::<i32>().unwrap();
 
         let rotation = match direction {
-            "L" => distance * -1,
+            "L" => -distance,
             "R" => distance,
             _ => panic!(),
         };
@@ -29,12 +30,12 @@ fn read_input() -> Vec<i32> {
     rotations
 }
 
-fn count_neutral_positions(rotations: Vec<i32>) -> i32 {
+fn count_zero_positions(rotations: &Vec<i32>) -> i32 {
     let mut counter = 0;
     let mut position = 50;
 
     for rotation in rotations {
-        position = (position + rotation) % 100;
+        position = (position + rotation).rem_euclid(100);
 
         if position == 0 {
             counter += 1;
@@ -43,3 +44,24 @@ fn count_neutral_positions(rotations: Vec<i32>) -> i32 {
 
     counter
 }
+
+fn count_zero_clicks(rotations: &Vec<i32>) -> i32 {
+    let mut counter = 0;
+    let mut position = 50;
+
+    for rotation in rotations {
+        position += rotation;
+
+        counter += (position / 100).abs();
+        if position < 0 && position != *rotation {
+            counter += 1;
+        }
+        if position == 0 {
+            counter += 1;
+        }
+
+        position = position.rem_euclid(100);
+    }
+
+    counter
+}