2025 - Day 1 part 1 - rust

2025/rust1/src/main.rs

@@ -0,0 +1,32 @@
+use std::io::{BufRead, BufReader};
+use std::fs::File;
+
+fn main (){
+    // let filename = "../1/input_example.txt";
+    let filename = "../1/input.txt";
+    let file = BufReader::new(File::open(filename).expect("Unable to open file"));
+
+    let mut dial: i32 = 50;
+    let mut count: i32 = 0;
+
+    for line in file.lines() {
+        let mut wline: String = line.unwrap();
+        let direction = wline.chars().next().unwrap();
+
+        wline.remove(0);
+        let distance: i32 = wline.parse().unwrap();        
+                
+        if direction == 'L' {            
+            dial -= distance;            
+        } else {            
+            dial += distance;            
+        }
+
+        dial = dial.rem_euclid(100);
+        if dial == 0{
+            count += 1;
+        }
+        
+    }
+    println!("count: {}\n", count)
+}