restructured for more days

src/day02.rs

@@ -0,0 +1,17 @@
+use std::fs::read_to_string;
+
+pub fn day_main() {
+    let input = read_to_string("input/day01.txt").unwrap();
+    println!("part1: {}", part1(&input));
+    // println!("part2: {}", part2(&input));
+}
+
+type Int = i32;
+
+fn part1(input: &str) -> Int {
+    0
+}
+
+// fn part2(input: &str) -> Int {
+//     0
+// }