adventofcode/src/main/java/AoC2017_10.java at main · pareronia/adventofcode · GitHub

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import static java.util.stream.Collectors.toList;

import com.github.pareronia.aoc.knothash.KnotHash;

import com.github.pareronia.aoc.knothash.KnotHash.State;

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;

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

public final class AoC2017_10 extends SolutionBase<String, Integer, String> {

private AoC2017_10(final boolean debug) {

super(debug);

}

public static AoC2017_10 create() {

return new AoC2017_10(false);

}

public static AoC2017_10 createDebug() {

return new AoC2017_10(true);

}

@Override

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

return inputs.getFirst();

}

private Integer solve1(final String input, final List<Integer> elements) {

final List<Integer> lengths =

Arrays.stream(input.split(",")).map(Integer::valueOf).collect(toList());

final State state = new State(elements, lengths, 0, 0);

final State ans = KnotHash.round(state);

return ans.elements().get(0) * ans.elements().get(1);

}

@Override

public Integer solvePart1(final String input) {

return solve1(input, new ArrayList<>(KnotHash.SEED));

}

@Override

public String solvePart2(final String input) {

return KnotHash.hexString(input);

}

@Override

protected void samples() {

final AoC2017_10 test = createDebug();

final String input = test.parseInput(List.of("3,4,1,5"));

assert test.solve1(input, new ArrayList<>(List.of(0, 1, 2, 3, 4))) == 12;

}

@Samples({

@Sample(

method = "part2",

input = "AoC 2017",

expected = "33efeb34ea91902bb2f59c9920caa6cd"),

@Sample(method = "part2", input = "1,2,3", expected = "3efbe78a8d82f29979031a4aa0b16a9d"),

@Sample(method = "part2", input = "1,2,4", expected = "63960835bcdc130f0b66d7ff4f6a5a8e"),

})

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

create().run();

}

adventofcode/src/main/java/AoC2017_10.java at main · pareronia/adventofcode · GitHub

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