Finished day 12 aoc part 1 with pathfinding library and it work woopwoop

advent_of_code/2022/12/src/main.rs

@@ -1,13 +1,16 @@
 use std::collections::HashMap;
+use pathfinding::prelude::dijkstra;
 
 fn main() {
-    let test_input = include_str!("../test.txt")
+    let test_input = include_str!("../input.txt")
         .split_whitespace()
         .collect::<Vec<&str>>();
 
     let mut start = (0, 0);
     let mut end = (0, 0);
-    let mut points : HashMap<(u32, u32), u32> = HashMap::new();
+    // let mut max_y = 0;
+    // let mut max_x = 0;
+    let mut points : HashMap<(i32, i32), i32> = HashMap::new();
 
     let mut y = 0;
     for line in test_input {
@@ -23,9 +26,45 @@ fn main() {
                 end = (x, y);
             }
 
-            points.insert((x, y), c as u32 - 'a' as u32);
+            points.insert((x, y), c as i32 - 'a' as i32);
+
+            // max_x = x;
             x += 1;
         }
+
+        // max_y = y;
         y += 1;
     }
+
+    let r = dijkstra(
+        &start, 
+        |&(x, y)| vec![((x-1, y), points.get(&(x-1, y)), (x, y)), 
+                       ((x+1, y), points.get(&(x+1, y)), (x, y)), 
+                       ((x, y+1), points.get(&(x, y+1)), (x, y)),
+                       ((x, y-1), points.get(&(x, y-1)), (x, y)),]
+            .into_iter()
+            .filter(|&(_, n, c)| match n {
+                None => false,
+                Some(&height) => height <= *points.get(&c).unwrap() + 1,
+            })
+            .map(|(coords, _, _)| (coords, 1)),
+        |&n| n == end);
+
+    println!("Number of steps taken: {}", r.expect("No path found").1);
+
+    // Testing the parsing
+
+    // for y in 0..=max_y {
+    //     for x in 0..=max_x {
+    //         if (x, y) == start {
+    //             print!("S");
+    //         } else if (x, y) == end {
+    //             print!("E")
+    //         } else {
+    //             let c = from_u32((points.get(&(x, y)).unwrap() + 'a' as i32) as u32).unwrap();
+    //             print!("{c}");
+    //         }
+    //     }
+    //     println!();
+    // }
 }