solve Day18 in Rust

Day18/python/solution1.py

@@ -1,7 +1,7 @@
 def parse_instructions(file_path):
     """Parse instructions from the given file."""
     try:
-        with open(file_path, 'r') as file:
+        with open(file_path, "r") as file:
             instructions = [line.strip().split() for line in file.readlines()]
             print(f"Parsed {len(instructions)} instructions from {file_path}")
             return instructions
@@ -9,16 +9,18 @@ def parse_instructions(file_path):
         print(f"Error reading file {file_path}: {e}")
         raise
 
+
 def apply_instruction(grid, position, direction, steps):
     """Apply a single instruction to the grid and update the position."""
-    deltas = {'U': (0, -1), 'D': (0, 1), 'L': (-1, 0), 'R': (1, 0)}
+    deltas = {"U": (0, -1), "D": (0, 1), "L": (-1, 0), "R": (1, 0)}
     dx, dy = deltas[direction]
     for _ in range(steps):
         position = (position[0] + dx, position[1] + dy)
         grid.add(position)
-        #print(f"Moved {direction} to {position}")
+        # print(f"Moved {direction} to {position}")
     return position
 
+
 def create_path(instructions):
     """Create the path based on the instructions."""
     grid = set()
@@ -29,29 +31,37 @@ def create_path(instructions):
         direction, steps = instruction[0], int(instruction[1])
         print(f"Applying instruction: {direction} {steps}")
         position = apply_instruction(grid, position, direction, steps)
-    
+
     return grid
 
+
 def flood_fill(grid, bounds):
     """Perform flood-fill to find cells outside the path."""
     filled = set()
-    to_fill = [(bounds[0], y) for y in range(bounds[2], bounds[3] + 1)] \
-            + [(bounds[1], y) for y in range(bounds[2], bounds[3] + 1)] \
-            + [(x, bounds[2]) for x in range(bounds[0], bounds[1] + 1)] \
-            + [(x, bounds[3]) for x in range(bounds[0], bounds[1] + 1)]
+    to_fill = (
+        [(bounds[0], y) for y in range(bounds[2], bounds[3] + 1)]
+        + [(bounds[1], y) for y in range(bounds[2], bounds[3] + 1)]
+        + [(x, bounds[2]) for x in range(bounds[0], bounds[1] + 1)]
+        + [(x, bounds[3]) for x in range(bounds[0], bounds[1] + 1)]
+    )
 
     while to_fill:
         x, y = to_fill.pop()
         if (x, y) in filled or (x, y) in grid:
             continue
         filled.add((x, y))
-        if x > bounds[0]: to_fill.append((x - 1, y))
-        if x < bounds[1]: to_fill.append((x + 1, y))
-        if y > bounds[2]: to_fill.append((x, y - 1))
-        if y < bounds[3]: to_fill.append((x, y + 1))
+        if x > bounds[0]:
+            to_fill.append((x - 1, y))
+        if x < bounds[1]:
+            to_fill.append((x + 1, y))
+        if y > bounds[2]:
+            to_fill.append((x, y - 1))
+        if y < bounds[3]:
+            to_fill.append((x, y + 1))
 
     return filled
 
+
 def calculate_area(grid):
     """Calculate the area inside the loop."""
     min_x = min(grid, key=lambda x: x[0])[0]
@@ -66,6 +76,7 @@ def calculate_area(grid):
 
     return inside_area
 
+
 def run_test(test_file):
     """Run the algorithm with test input."""
     try:
@@ -79,6 +90,7 @@ def run_test(test_file):
         print(f"Assertion Error: {e}")
         return False
 
+
 def main():
     """Main function to run the puzzle solution."""
     test_file = "../test.txt"
@@ -97,5 +109,6 @@ def main():
     else:
         print("Test failed. Halting execution.")
 
+
 if __name__ == "__main__":
-    main()
+    main()

Day18/python/solution2.py

@@ -1,7 +1,7 @@
 def parse_instructions(file_path):
     """Parse instructions from the given file."""
     try:
-        with open(file_path, 'r') as file:
+        with open(file_path, "r") as file:
             lines = file.read().splitlines()
         print(f"Parsed {len(lines)} instructions from {file_path}")
         return lines
@@ -9,6 +9,7 @@ def parse_instructions(file_path):
         print(f"Error reading file {file_path}: {e}")
         raise
 
+
 def calculate_area(lines):
     """Calculate the area inside the loop defined by the instructions."""
     DIRECTIONS = [(0, 1), (1, 0), (0, -1), (-1, 0)]
@@ -24,18 +25,29 @@ def calculate_area(lines):
         row, column = points[-1]
         points.append((row + dr * steps, column + dc * steps))
 
-    area = abs(
-        sum(x1 * y2 - x2 * y1 for (x1, y1), (x2, y2) in zip(points, points[1:] + points[:1]))
-    ) // 2 + boundary // 2 + 1
+    area = (
+        abs(
+            sum(
+                x1 * y2 - x2 * y1
+                for (x1, y1), (x2, y2) in zip(points, points[1:] + points[:1])
+            )
+        )
+        // 2
+        + boundary // 2
+        + 1
+    )
 
     return area
 
+
 def run_test(test_file, expected_result):
     """Run the algorithm with test input and compare with the expected result."""
     try:
         lines = parse_instructions(test_file)
         calculated_area = calculate_area(lines)
-        assert calculated_area == expected_result, f"Test failed, expected {expected_result}, got {calculated_area}"
+        assert (
+            calculated_area == expected_result
+        ), f"Test failed, expected {expected_result}, got {calculated_area}"
         print(f"Test passed, area: {calculated_area}")
     except AssertionError as e:
         print(e)
@@ -44,11 +56,14 @@ def run_test(test_file, expected_result):
         print(f"Error during test execution: {e}")
         raise
 
+
 def main():
     """Main function to run the puzzle solution."""
     test_file = "../test.txt"
     input_file = "../input.txt"
-    expected_test_area = 952408144115  # Replace with the correct expected area for the test
+    expected_test_area = (
+        952408144115  # Replace with the correct expected area for the test
+    )
 
     # Run test
     try:
@@ -61,5 +76,6 @@ def main():
     except Exception as e:
         print(f"Execution halted due to error: {e}")
 
+
 if __name__ == "__main__":
     main()

Day18/rust/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Day18/rust/src/main.rs

@@ -0,0 +1,73 @@
+use std::fs::File;
+use std::io::{self, BufRead};
+
+fn parse_instructions(file_path: &str) -> io::Result<Vec<String>> {
+    let file = File::open(file_path)?;
+    let lines = io::BufReader::new(file).lines();
+    let instructions: Vec<String> = lines.collect::<Result<_, _>>()?;
+    println!(
+        "Parsed {} instructions from {}",
+        instructions.len(),
+        file_path
+    );
+    Ok(instructions)
+}
+
+fn calculate_area(lines: &Vec<String>) -> i64 {
+    let directions: Vec<(i64, i64)> = vec![(0, 1), (1, 0), (0, -1), (-1, 0)];
+    let mut points: Vec<(i64, i64)> = vec![(0, 0)];
+    let mut boundary = 0;
+
+    for line in lines {
+        if line.is_empty() {
+            continue;
+        }
+
+        if let Some(color) = line.split(' ').last() {
+            let instructions = &color[2..color.len() - 1];
+            let direction_index =
+                i64::from_str_radix(&instructions[instructions.len() - 1..], 16).unwrap();
+            let (dr, dc) = directions[direction_index as usize];
+            let steps = i64::from_str_radix(&instructions[..instructions.len() - 1], 16).unwrap();
+            boundary += steps;
+            let (row, column) = points.last().unwrap();
+            points.push((row + dr * steps, column + dc * steps));
+        }
+    }
+
+    let mut area = 0;
+    for i in 0..points.len() {
+        let (x1, y1) = points[i];
+        let (x2, y2) = points[(i + 1) % points.len()];
+        area += x1 * y2 - x2 * y1;
+    }
+
+    (area.abs() / 2) + (boundary / 2) + 1
+}
+
+fn run_test(test_file: &str, expected_result: i64) -> io::Result<()> {
+    let lines = parse_instructions(test_file)?;
+    let calculated_area = calculate_area(&lines);
+    assert_eq!(calculated_area, expected_result, "Test failed");
+    println!("Test passed, area: {}", calculated_area);
+    Ok(())
+}
+
+fn main() {
+    let test_file = "../test.txt";
+    let input_file = "../input.txt";
+    let expected_test_area: i64 = 952408144115; // Replace with the correct expected area for the test
+
+    if let Err(e) = run_test(test_file, expected_test_area) {
+        eprintln!("Execution halted due to error: {}", e);
+        return;
+    }
+
+    match parse_instructions(input_file) {
+        Ok(lines) => {
+            let area = calculate_area(&lines);
+            println!("Puzzle result (area): {}", area);
+        }
+        Err(e) => eprintln!("Execution halted due to error: {}", e),
+    }
+}

Day18/ts/solution.ts

@@ -14,7 +14,7 @@ function parseInstructions(filePath: string): string[] {
 
 function calculateArea(lines: string[]): number {
     const DIRECTIONS: [number, number][] = [[0, 1], [1, 0], [0, -1], [-1, 0]];
-    let points: [number, number][] = [[0, 0]];
+    const points: [number, number][] = [[0, 0]];
     let boundary: number = 0;
 
     for (const line of lines) {