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Commit 50b3add

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day03 for AoC 2023 (part 1)
Took 7 minutes
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package aminetti.adventofcode2024.day03;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class Day03 {
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private static final Logger LOGGER = LoggerFactory.getLogger(Day03.class);
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private List<String> input;
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public Day03() {
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}
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public void parseInput(List<String> input) {
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this.input = input;
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}
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public long solvePart1() {
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Pattern p = Pattern.compile("mul\\((\\d{1,3}),(\\d{1,3})\\)");
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long sum = 0L;
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for (String s : input) {
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Matcher matcher = p.matcher(s);
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while (matcher.find()) {
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Long a = Long.valueOf(matcher.group(1));
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Long b = Long.valueOf(matcher.group(2));
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sum += a * b;
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}
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}
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return sum;
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}
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public long solvePart2() {
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return 0;
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}
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}
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package aminetti.adventofcode2024.day03;
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import org.junit.jupiter.api.Test;
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import java.io.IOException;
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import java.util.List;
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import static java.nio.charset.StandardCharsets.UTF_8;
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import static org.apache.commons.io.IOUtils.readLines;
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import static org.apache.commons.io.IOUtils.resourceToString;
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import static org.hamcrest.MatcherAssert.assertThat;
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import static org.hamcrest.Matchers.is;
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class Day03Test {
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@Test
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void actualInputPart1() throws IOException {
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// given
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List<String> input = readLines(resourceToString("/day03/day03_input.txt", UTF_8));
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// when
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Day03 solver = new Day03();
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solver.parseInput(input);
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long l = solver.solvePart1();
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// then
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assertThat(l, is(179834255L));
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}
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@Test
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void testInputPart1() throws IOException {
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// given
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List<String> input = readLines(resourceToString("/day03/day03_input_test.txt", UTF_8));
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// when
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Day03 solver = new Day03();
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solver.parseInput(input);
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long l = solver.solvePart1();
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// then
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assertThat(l, is(161L));
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}
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@Test
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void actualInputPart2() throws IOException {
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// given
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List<String> input = readLines(resourceToString("/day03/day03_input.txt", UTF_8));
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// when
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Day03 solver = new Day03();
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solver.parseInput(input);
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long l = solver.solvePart2();
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// then
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assertThat(l, is(0L));
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}
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@Test
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void testInputPart2() throws IOException {
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// given
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List<String> input = readLines(resourceToString("/day03/day03_input_test.txt", UTF_8));
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// when
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Day03 solver = new Day03();
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solver.parseInput(input);
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long l = solver.solvePart2();
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// then
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assertThat(l, is(0L));
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}
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}

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