feat: add day 13 p2

README.md

@@ -41,8 +41,9 @@ Solutions for [Advent of Code](https://adventofcode.com/) in [Rust](https://www.
 | [Day 10](./src/bin/10.rs) | `164.5µs` | `287.9µs` |
 | [Day 11](./src/bin/11.rs) | `30.5s` | `-` |
 | [Day 12](./src/bin/12.rs) | `3.1ms` | `91.5ms` |
+| [Day 13](./src/bin/13.rs) | `730.1µs` | `144.7µs` |
 
-**Total: 47928.36ms**
+**Total: 47929.23ms**
 <!--- benchmarking table --->
 
 ---

src/bin/13.rs

@@ -6,24 +6,31 @@ enum Type {
     Empty,
 }
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, Clone, Hash, Eq, Ord, PartialOrd)]
 struct Pos {
     x: u32,
     y: u32,
+    depth: usize,
+}
+
+impl PartialEq for Pos {
+    fn eq(&self, other: &Self) -> bool {
+        self.x == other.x && self.y == other.y
+    }
 }
 
 impl Pos {
-    fn init(x: u32, y: u32) -> Self {
-        Self { x, y }
+    fn init(x: u32, y: u32, depth: usize) -> Self {
+        Self { x, y, depth }
     }
     fn origin() -> Self {
-        Self { x: 1, y: 1 }
+        Self { x: 1, y: 1, depth: 1 }
     }
     fn dest_test() -> Self {
-        Self { x: 7, y: 4 }
+        Self { x: 7, y: 4, depth: 0 }
     }
     fn dest() -> Self {
-        Self { x: 31, y: 39 }
+        Self { x: 31, y: 39, depth: 0 }
     }
     fn get_type(&self, nbr: u32) -> Type {
         let nb: u32 =
@@ -37,13 +44,13 @@ impl Pos {
     fn neighbors(&self) -> Vec<Pos> {
         let mut res: Vec<Pos> = Vec::new();
         if self.x > 0 {
-            res.push(Pos::init(self.x - 1, self.y));
+            res.push(Pos::init(self.x - 1, self.y, self.depth + 1));
         }
         if self.y > 0 {
-            res.push(Pos::init(self.x, self.y - 1))
+            res.push(Pos::init(self.x, self.y - 1, self.depth + 1))
         }
-        res.push(Pos::init(self.x + 1, self.y));
-        res.push(Pos::init(self.x, self.y + 1));
+        res.push(Pos::init(self.x + 1, self.y, self.depth + 1));
+        res.push(Pos::init(self.x, self.y + 1, self.depth + 1));
         res
     }
     fn empty_neighbors(&self, nbr: u32) -> Vec<Pos> {
@@ -92,33 +99,25 @@ fn take_n_steps(paths: Vec<Vec<Pos>>, known: &mut Vec<Pos>, nbr: u32, steps: usi
     }
 }
 
-fn print_maze(path: &[Pos], nbr: u32) {
-    let origin = Pos::origin();
-    let end = if nbr == 10 {
-        Pos::dest_test()
-    } else {
-        Pos::dest()
-    };
-    for y in 0..50 {
-        for x in 0..80 {
-            let p = Pos::init(x, y);
-            if p == origin {
-                print!("S");
-            } else if p == end {
-                print!("E");
-            } else if path.contains(&p) {
-                print!("O");
-            } else {
-                match p.get_type(nbr) {
-                    Type::Wall => print!("#"),
-                    Type::Empty => print!("."),
-                }
-            }
-        }
-        println!();
-    }
-    println!();
-}
+// use std::collections::HashMap;
+
+// fn print_maze(nbr: u32, known_store: &HashMap<Pos, usize>) {
+//     for y in 0..50 {
+//         for x in 0..50 {
+//             let p = Pos::init(x, y, 0);
+//             if let Some(depth) = known_store.get(&p) {
+//                 print!("{:^4?}", depth);
+//             } else {
+//                 match p.get_type(nbr) {
+//                     Type::Wall => print!("####"),
+//                     Type::Empty => print!("    "),
+//                 }
+//             }
+//         }
+//         println!();
+//     }
+//     println!();
+// }
 
 pub fn part_one(input: &str) -> Option<usize> {
     let nbr = input
@@ -136,7 +135,6 @@ pub fn part_one(input: &str) -> Option<usize> {
     };
 
     let path = search_for_pos(initial_path, &mut known, nbr, dest);
-    print_maze(&path, nbr);
     Some(path.len() - 1)
 }
 
@@ -150,8 +148,18 @@ pub fn part_two(input: &str) -> Option<usize> {
     let initial_path = vec![vec![Pos::origin()]];
     let mut known = vec![Pos::origin()];
 
-    take_n_steps(initial_path, &mut known, nbr, 51);
-    print_maze(&known, nbr);
+    take_n_steps(initial_path, &mut known, nbr, 50);
+        
+    // let mut known_store: HashMap<Pos, usize> = HashMap::new();
+    // for elem in &known {
+    //     let mut pos = elem.clone();
+    //     pos.depth = 0;
+    //     known_store.insert(pos, elem.depth);
+    // }
+    // print_maze(nbr, &known_store);
+    // println!("Known store: {:?}", known_store.len());
+    known.sort();
+    known.dedup();
     Some(known.len())
 }
 
@@ -168,6 +176,6 @@ mod tests {
     #[test]
     fn test_part_two() {
         let result = part_two(&advent_of_code::template::read_file("examples", DAY));
-        assert_eq!(result, None);
+        assert_eq!(result, Some(151));
     }
 }