solve 18-12-2025

18-12-2025/main.rs

@@ -0,0 +1,33 @@
+use std::fs;
+
+fn main() {
+
+    let mut pointer = 50;
+    let mut zero_count = 0;
+
+    let input: String = fs::read_to_string("input.txt").expect("text file cannot be read to string");
+    let input = input.split("\n");
+    // let input = ["L68", "L30", "R48", "L5", "R60", "L55", "L1", "L99", "R14", "L82"];
+
+    for element in input {
+        if element == "" {
+            break;
+        }
+        let steps: i32 = (&element[1..]).parse().unwrap();
+        if element.contains("L") {
+           pointer -= steps; 
+        } else {
+            pointer += steps;
+        }
+        pointer = pointer % 100;
+        if pointer < 0 {
+            pointer += 100;
+        }
+        println!("The dial is rotated {element} to point at {pointer}");
+        if pointer == 0 {
+            zero_count += 1;
+        }
+    }
+    println!("Number of Zeros: {zero_count}");
+}
+