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feat: solve day 14
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6 files changed

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‎README.md‎

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- [Day 11 - Plutonian Pebbles](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day11)
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- [Day 12 - Garden Groups](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day12)
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- [Day 13 - Claw Contraption](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day13)
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- [Day 14](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day14)
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- [Day 14 - Restroom Redoubt](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day14)
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- [Day 15](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day15)
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- [Day 16](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day16)
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- [Day 17](https://github.com/Flashky/advent-of-code-2024/tree/master/src/main/java/com/adventofcode/flashk/day17)

‎src/main/java/com/adventofcode/flashk/day14/README.md‎

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# Day 14:
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# Day 14: Restroom Redoubt
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[https://adventofcode.com/2024/day/14](https://adventofcode.com/2024/day/14)

‎src/main/java/com/adventofcode/flashk/day14/RestroomRedoubt.java‎

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package com.adventofcode.flashk.day14;
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import com.adventofcode.flashk.common.Collider2D;
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import com.adventofcode.flashk.common.Vector2;
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import java.util.List;
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import java.util.Optional;
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public class RestroomRedoubt {
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private final int rows;
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private final int cols;
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private final List<Robot> robots;
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public RestroomRedoubt(List<String> inputs, int rows, int cols) {
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this.rows = rows;
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this.cols = cols;
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robots = inputs.stream().map(Robot::new).toList();
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}
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public int solveA(int seconds) {
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int q1Robots = 0;
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int q2Robots = 0;
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int q3Robots = 0;
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int q4Robots = 0;
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Collider2D quadrant1 = new Collider2D(new Vector2(0,0), new Vector2((cols/2)-1, (rows/2)-1));
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Collider2D quadrant2 = new Collider2D(new Vector2((cols/2)+1,0), new Vector2(cols-1, (rows/2)-1));
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Collider2D quadrant3 = new Collider2D(new Vector2(0,(rows/2)+1), new Vector2((cols/2)-1,rows-1));
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Collider2D quadrant4 = new Collider2D(new Vector2((cols/2)+1,(rows/2)+1), new Vector2(cols-1,rows-1));
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for(Robot robot : robots) {
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robot.move(seconds, rows, cols);
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// quadrant1.collidesWith(robot.getPosition()) was not working. Possible reasons:
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// - collidesWith(Vector2) is only checking if the point is part of a line instead of an area.
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// - Didn't test diagonal test cases
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if(quadrant1.collidesWith(new Collider2D(robot.getPosition()))) {
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q1Robots++;
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} else if(quadrant2.collidesWith(new Collider2D(robot.getPosition()))) {
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q2Robots++;
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} else if(quadrant3.collidesWith(new Collider2D(robot.getPosition()))) {
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q3Robots++;
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} else if(quadrant4.collidesWith(new Collider2D(robot.getPosition()))) {
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q4Robots++;
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}
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}
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return q1Robots * q2Robots * q3Robots * q4Robots;
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}
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public int solveB() {
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int seconds = 0;
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long count = -1;
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do {
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seconds++;
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for (Robot robot : robots) {
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robot.move(rows, cols);
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count = robots.stream().map(Robot::getPosition).distinct().count();
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}
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} while (count != robots.size()) ;
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paint();
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return seconds;
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}
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private void paint() {
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for(int row = 0; row < rows; row++) {
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for(int col = 0; col < cols; col++) {
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final int x = col;
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final int y = row;
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Optional<Robot> robot = robots.stream()
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.filter(r -> r.getPosition().getX() == x)
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.filter(r -> r.getPosition().getY() == y)
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.distinct()
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.findFirst();
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if(robot.isPresent()) {
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System.out.print("#");
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} else {
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System.out.print(".");
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}
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}
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System.out.println();
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}
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}
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}

‎src/main/java/com/adventofcode/flashk/day14/Robot.java‎

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package com.adventofcode.flashk.day14;
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import com.adventofcode.flashk.common.Vector2;
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import lombok.Getter;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class Robot {
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private static final Pattern ROBOT_PATTERN = Pattern.compile("p=(-?\\d*),(-?\\d*) v=(-?\\d*),(-?\\d*)");
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@Getter
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private Vector2 position;
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private final Vector2 direction;
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public Robot(String input) {
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super();
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Matcher matcher = ROBOT_PATTERN.matcher(input);
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if(matcher.find()) {
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String px = matcher.group(1);
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String py = matcher.group(2);
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String vx = matcher.group(3);
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String vy = matcher.group(4);
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position = new Vector2(Integer.parseInt(px), Integer.parseInt(py));
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direction = new Vector2(Integer.parseInt(vx), Integer.parseInt(vy));
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} else {
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throw new IllegalArgumentException("Invalid string");
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}
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}
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public void move(int seconds, int rows, int cols) {
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for(int i = 0; i < seconds; i++) {
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move(rows, cols);
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}
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}
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public void move(int rows, int cols) {
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int x1 = position.getX() + direction.getX();
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int y1 = position.getY() + direction.getY();
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int x2 = (cols + x1) % cols;
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int y2 = (rows + y1) % rows;
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position = new Vector2(x2,y2);
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}
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}

‎src/test/java/com/adventofcode/flashk/day14/Day14Test.java‎

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import java.util.List;
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import org.junit.jupiter.api.Disabled;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
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import org.junit.jupiter.api.Order;
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import com.adventofcode.flashk.common.test.constants.TestFilename;
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import com.adventofcode.flashk.common.test.constants.TestFolder;
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import com.adventofcode.flashk.common.test.constants.TestTag;
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import com.adventofcode.flashk.common.test.utils.PuzzleTest;
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import com.adventofcode.flashk.common.test.utils.Input;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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@DisplayName(TestDisplayName.DAY_14)
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@TestMethodOrder(OrderAnnotation.class)
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@Disabled // TODO Remove comment when implemented
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public class Day14Test extends PuzzleTest {
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class Day14Test {
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private static final String INPUT_FOLDER = TestFolder.DAY_14;
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private static final int MAX_ROWS_SAMPLE = 7;
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private static final int MAX_COLS_SAMPLE = 11;
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private static final int MAX_ROWS_INPUT = 103;
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private static final int MAX_COLS_INPUT = 101;
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@Test
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@Order(1)
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@Tag(TestTag.PART_1)
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@Tag(TestTag.SAMPLE)
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@DisplayName(TestDisplayName.PART_1_SAMPLE)
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public void testSolvePart1Sample() {
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void part1SampleTest() {
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// Read input file
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List<String> inputs = Input.readStringLines(INPUT_FOLDER, TestFilename.INPUT_FILE_SAMPLE);
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assertEquals(0L,0L);
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RestroomRedoubt restroomRedoubt = new RestroomRedoubt(inputs, MAX_ROWS_SAMPLE, MAX_COLS_SAMPLE);
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assertEquals(12L,restroomRedoubt.solveA(100));
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}
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@Test
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@Order(2)
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@Tag(TestTag.PART_1)
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@Tag(TestTag.INPUT)
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@DisplayName(TestDisplayName.PART_1_INPUT)
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public void testSolvePart1Input() {
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void part1InputTest() {
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// Read input file
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List<String> inputs = Input.readStringLines(INPUT_FOLDER, TestFilename.INPUT_FILE);
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RestroomRedoubt restroomRedoubt = new RestroomRedoubt(inputs, MAX_ROWS_INPUT, MAX_COLS_INPUT);
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System.out.println("Solution: ");
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assertEquals(0L,0L);
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assertEquals(214109808,restroomRedoubt.solveA(100));
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}
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@Test
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@Order(3)
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@Tag(TestTag.PART_2)
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@Tag(TestTag.SAMPLE)
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@DisplayName(TestDisplayName.PART_2_SAMPLE)
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public void testSolvePart2Sample() {
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// Read input file
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List<String> inputs = Input.readStringLines(INPUT_FOLDER, TestFilename.INPUT_FILE_SAMPLE);
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assertEquals(0L,0L);
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}
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@Test
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@Order(4)
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@Order(3)
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@Tag(TestTag.PART_2)
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@Tag(TestTag.INPUT)
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@DisplayName(TestDisplayName.PART_2_INPUT)
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public void testSolvePart2Input() {
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void part2InputTest() {
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// Read input file
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List<String> inputs = Input.readStringLines(INPUT_FOLDER, TestFilename.INPUT_FILE);
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RestroomRedoubt restroomRedoubt = new RestroomRedoubt(inputs, MAX_ROWS_INPUT, MAX_COLS_INPUT);
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80-
System.out.println("Solution: ");
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assertEquals(0L,0L);
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assertEquals(7687, restroomRedoubt.solveB());
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}
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‎src/test/resources/inputs‎

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