adventofcode/src/main/java/AoC2017_11.java at main · pareronia/adventofcode · GitHub

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import com.github.pareronia.aoc.geometry3d.Position3D;

import com.github.pareronia.aoc.geometry3d.Vector3D;

import com.github.pareronia.aoc.solution.Sample;

import com.github.pareronia.aoc.solution.Samples;

import com.github.pareronia.aoc.solution.SolutionBase;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Map;

@SuppressWarnings({"PMD.ClassNamingConventions", "PMD.NoPackage"})

public final class AoC2017_11 extends SolutionBase<List<Position3D>, Integer, Integer> {

private static final Position3D ORIGIN = Position3D.of(0, 0, 0);

private static final Map<String, Vector3D> HEADING =

Map.of(

"n", Vector3D.of(0, -1, 1),

"ne", Vector3D.of(1, -1, 0),

"se", Vector3D.of(1, 0, -1),

"s", Vector3D.of(0, 1, -1),

"sw", Vector3D.of(-1, 1, 0),

"nw", Vector3D.of(-1, 0, 1));

private AoC2017_11(final boolean debug) {

super(debug);

}

public static AoC2017_11 create() {

return new AoC2017_11(false);

}

public static AoC2017_11 createDebug() {

return new AoC2017_11(true);

}

@Override

protected List<Position3D> parseInput(final List<String> inputs) {

final List<Position3D> positions = new ArrayList<>(List.of(ORIGIN));

Arrays.stream(inputs.getFirst().split(","))

.map(HEADING::get)

.map(v -> positions.getLast().translate(v))

.forEach(positions::add);

return positions;

}

private int steps(final Position3D p) {

return p.manhattanDistance(ORIGIN) / 2;

}

@Override

public Integer solvePart1(final List<Position3D> positions) {

return steps(positions.getLast());

}

@Override

public Integer solvePart2(final List<Position3D> positions) {

return positions.stream().mapToInt(this::steps).max().getAsInt();

}

@SuppressWarnings("PMD.AvoidDuplicateLiterals")

@Samples({

@Sample(method = "part1", input = "ne,ne,ne", expected = "3"),

@Sample(method = "part1", input = "ne,ne,sw,sw", expected = "0"),

@Sample(method = "part1", input = "ne,ne,s,s", expected = "2"),

@Sample(method = "part1", input = "se,sw,se,sw,sw", expected = "3"),

})

public static void main(final String[] args) throws Exception {

create().run();

}

adventofcode/src/main/java/AoC2017_11.java at main · pareronia/adventofcode · GitHub

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