day07 task 1

src/tasks/day07.rs

@@ -0,0 +1,28 @@
+use crate::tasks::day05::IntCodeComputer;
+use itertools::Itertools;
+
+#[allow(dead_code)]
+pub fn run() {
+    let prog_code: Vec<_> = std::fs::read_to_string("input/day07.txt")
+        .unwrap()
+        .split(",")
+        .map(|s| s.parse::<i32>().unwrap())
+        .collect();
+    task1(prog_code.clone());
+}
+
+fn task1(input: Vec<i32>) {
+    let phases = vec![0, 1, 2, 3, 4];
+    let result = phases
+        .iter()
+        .permutations(phases.len())
+        .map(|perm| {
+            perm.iter().fold(0, |signal, phase| {
+                let mut computer = IntCodeComputer::new(vec![**phase, signal], input.clone());
+                computer.run_until_end();
+                *computer.get_output().last().unwrap()
+            })
+        })
+        .max();
+    println!("Task 1: best signal is {}", result.unwrap());
+}