Starting day 9: use HashMap, not Vec for integers

day9/src/main.rs

@@ -0,0 +1,30 @@
+use std::error::Error;
+use std::result;
+
+mod intcode;
+
+use intcode::{Intcode, read_intcode};
+
+const INPUT: &str = "input/input.txt";
+
+type Result<T> = result::Result<T, Box<dyn Error>>;
+
+fn solve_part1() -> Result<u32> {
+    Ok(1)
+}
+
+fn solve_part2() -> Result<u32> {
+    Ok(1)
+}
+
+fn main() -> Result<()> {
+    println!("Part 1: {}", solve_part1()?);
+    println!("Part 2: {}", solve_part2()?);
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+}