Day 9, both puzzles

src/bin/d9p1.rs

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+use aoc22::{day9, util};
+
+pub fn main() {
+    let motions = day9::parse_motions(&util::parse_input());
+    let mut state = day9::State::new(1);
+
+    for motion in &motions {
+        day9::execute_motion(&mut state, &motion);
+    }
+
+    println!("State after all motions:");
+    state.print();
+    println!("Visited fields: {}", state.visited.len());
+}

src/bin/d9p2.rs

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+use aoc22::{day9, util};
+
+pub fn main() {
+    let motions = day9::parse_motions(&util::parse_input());
+    let mut state = day9::State::new(9);
+
+    for motion in &motions {
+        day9::execute_motion(&mut state, &motion);
+    }
+
+    println!("State after all motions:");
+    state.print();
+    println!("Visited fields: {}", state.visited.len());
+}