add part 1 back to day 1

day1/rust/src/main.rs

@@ -3,8 +3,27 @@ use std::fs;
 fn main() {
     let input = fs::read_to_string("../input.txt").expect("Could not read file");
 
-    let lines: Vec<i32> = input.lines().map(|s| s.parse::<i32>().unwrap()).collect();
+    let lines: Vec<i32> = input.lines().map(|s| s.parse().unwrap()).collect();
 
+    part1(&lines);
+    part2(&lines);
+}
+
+fn part1(lines: &Vec<i32>) {
+    let mut previous: i32 = 10000;
+    let mut increases: i32 = 0;
+
+    for current in lines.iter().map(|a| *a) {
+        if previous < current {
+            increases += 1;
+        }
+        previous = current;
+    }
+
+    println!("Increases: {}", increases);
+}
+
+fn part2(lines: &Vec<i32>) {
     let mut previous: i32 = 10000;
     let mut increases = 0;
 
@@ -15,7 +34,6 @@ fn main() {
             increases += 1;
         }
         previous = current;
-        // println!("{}", current);
     }
 
     println!("Increases: {}", increases);