Add Day 1 of 2015

.gitignore

@@ -22,3 +22,5 @@
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 replay_pid*
+
+target

pom.xml

@@ -1,34 +1,83 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-
-	<groupId>com.belellou.kevin</groupId>
-	<artifactId>advent-of-code</artifactId>
-	<version>1.0-SNAPSHOT</version>
-
-	<name>Advent of Code</name>
-	<description>Personal repository to develop and store my answers to the incredible puzzles from adventofcode.com</description>
-	<url>https://github.com/kevin-belellou/advent-of-code</url>
-
-	<developers>
-		<developer>
-			<name>Kévin Belellou</name>
-		</developer>
-	</developers>
-
-	<properties>
-		<maven.compiler.source>21</maven.compiler.source>
-		<maven.compiler.target>21</maven.compiler.target>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-	</properties>
-
-	<dependencies>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>commons-lang3</artifactId>
-			<version>3.17.0</version>
-		</dependency>
-	</dependencies>
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.belellou.kevin</groupId>
+    <artifactId>advent-of-code</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <name>Advent of Code</name>
+    <description>Personal repository to develop and store my answers to the incredible puzzles from adventofcode.com
+    </description>
+    <url>https://github.com/kevin-belellou/advent-of-code</url>
+
+    <developers>
+        <developer>
+            <name>Kévin Belellou</name>
+        </developer>
+    </developers>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
+        <!-- Dependency versions -->
+        <commons-lang3.version>3.17.0</commons-lang3.version>
+        <assertj.version>3.26.3</assertj.version>
+        <junit.version>5.11.3</junit.version>
+
+        <!-- Plugin versions -->
+        <maven-surefire-plugin.version>3.3.1</maven-surefire-plugin.version>
+        <maven-failsafe-plugin.version>3.3.1</maven-failsafe-plugin.version>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.junit</groupId>
+                <artifactId>junit-bom</artifactId>
+                <version>${junit.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+
+        <!-- Test scope -->
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
+            </plugin>
+
+            <plugin>
+                <artifactId>maven-failsafe-plugin</artifactId>
+                <version>${maven-failsafe-plugin.version}</version>
+            </plugin>
+        </plugins>
+    </build>
 </project>

src/main/java/com/belellou/kevin/advent/generic/AbstractDaySolver.java

@@ -0,0 +1,50 @@
+package com.belellou.kevin.advent.generic;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+
+public abstract class AbstractDaySolver implements DaySolver {
+
+    private static final String SEPARATOR = "/";
+    private static final String INPUT_FOLDER = "src/main/resources/";
+    private static final String INPUT_FILE_NAME = "/input.txt";
+
+    private final String input;
+
+    protected AbstractDaySolver(Year year, Day day) {
+        input = INPUT_FOLDER + year.toString() + SEPARATOR + day.toString() + INPUT_FILE_NAME;
+    }
+
+    private BufferedReader getReader() {
+        try {
+            FileReader fileReader = new FileReader(input);
+            return new BufferedReader(fileReader);
+        } catch (FileNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public int solveFirstStar() {
+        try (BufferedReader reader = getReader()) {
+            return doSolveFirstStar(reader);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public int solveSecondStar() {
+        try (BufferedReader reader = getReader()) {
+            return doSolveSecondStar(reader);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    protected abstract int doSolveFirstStar(BufferedReader reader) throws IOException;
+
+    protected abstract int doSolveSecondStar(BufferedReader reader) throws IOException;
+}

src/main/java/com/belellou/kevin/advent/generic/Day.java

@@ -0,0 +1,41 @@
+package com.belellou.kevin.advent.generic;
+
+public enum Day {
+
+    DAY_1("1"),
+    DAY_2("2"),
+    DAY_3("3"),
+    DAY_4("4"),
+    DAY_5("5"),
+    DAY_6("6"),
+    DAY_7("7"),
+    DAY_8("8"),
+    DAY_9("9"),
+    DAY_10("10"),
+    DAY_11("11"),
+    DAY_12("12"),
+    DAY_13("13"),
+    DAY_14("14"),
+    DAY_15("15"),
+    DAY_16("16"),
+    DAY_17("17"),
+    DAY_18("18"),
+    DAY_19("19"),
+    DAY_20("20"),
+    DAY_21("21"),
+    DAY_22("22"),
+    DAY_23("23"),
+    DAY_24("24"),
+    DAY_25("25");
+
+    private final String day;
+
+    Day(final String day) {
+        this.day = day;
+    }
+
+    @Override
+    public String toString() {
+        return day;
+    }
+}

src/main/java/com/belellou/kevin/advent/generic/DaySolver.java

@@ -0,0 +1,8 @@
+package com.belellou.kevin.advent.generic;
+
+public interface DaySolver {
+
+    int solveFirstStar();
+
+    int solveSecondStar();
+}

src/main/java/com/belellou/kevin/advent/generic/Year.java

@@ -0,0 +1,26 @@
+package com.belellou.kevin.advent.generic;
+
+public enum Year {
+
+    YEAR_2015("2015"),
+    YEAR_2016("2016"),
+    YEAR_2017("2017"),
+    YEAR_2018("2018"),
+    YEAR_2019("2019"),
+    YEAR_2020("2020"),
+    YEAR_2021("2021"),
+    YEAR_2022("2022"),
+    YEAR_2023("2023"),
+    YEAR_2024("2024");
+
+    private final String year;
+
+    Year(final String year) {
+        this.year = year;
+    }
+
+    @Override
+    public String toString() {
+        return year;
+    }
+}

src/main/java/com/belellou/kevin/advent/year2015/Day1.java

@@ -0,0 +1,56 @@
+package com.belellou.kevin.advent.year2015;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+
+import org.apache.commons.lang3.StringUtils;
+
+import com.belellou.kevin.advent.generic.AbstractDaySolver;
+import com.belellou.kevin.advent.generic.Day;
+import com.belellou.kevin.advent.generic.Year;
+
+public class Day1 extends AbstractDaySolver {
+
+    private static final int STARTING_FLOOR = 0;
+
+    public Day1() {
+        super(Year.YEAR_2015, Day.DAY_1);
+    }
+
+    @Override
+    protected int doSolveFirstStar(BufferedReader reader) throws IOException {
+        String line = reader.readLine();
+
+        int up = StringUtils.countMatches(line, "(");
+        int down = StringUtils.countMatches(line, ")");
+
+        int final_floor = STARTING_FLOOR + up - down;
+        System.out.println("Final floor is: " + final_floor);
+
+        return final_floor;
+    }
+
+    @Override
+    protected int doSolveSecondStar(BufferedReader reader) throws IOException {
+        String line = reader.readLine();
+
+        int currentFloor = STARTING_FLOOR;
+        for (int i = 0; true; i++) {
+            char c = line.charAt(i);
+
+            if (c == '(') {
+                currentFloor++;
+            } else if (c == ')') {
+                currentFloor--;
+            } else {
+                throw new IllegalStateException("Unexpected character: " + c);
+            }
+
+            if (currentFloor == -1) {
+                int basementPosition = i + 1;
+                System.out.println("Basement entered a position " + basementPosition);
+                return basementPosition;
+            }
+        }
+    }
+}

src/main/resources/2015/1/input.txt

@@ -0,0 +1 @@
+((((()(()(((((((()))(((()((((()())(())()(((()((((((()((()(()(((()(()((())))()((()()())))))))))()((((((())((()))(((((()(((((((((()()))((()(())()((())((()(()))((()))()))()(((((()(((()()))()())((()((((())()())()((((())()(()(()(((()(())(()(())(((((((())()()(((())(()(()(()(())))(()((((())((()))(((()(()()(((((()()(()(((()(((((())()))()((()(()))()((()((((())((((())(()(((())()()(()()()()()(())((((())((())(()()))()((((())))((((()())()((((())((()())((())(())(((((()((((()(((()((((())(()(((()()))()))((((((()((())()())))(((()(()))(()()(()(((()(()))((()()()())((()()()(((())())()())())())((()))(()(()))(((((()(()(())((()(())(())()((((()())()))((((())(())((())())((((()(((())(())((()()((((()((((((()(())()()(()(()()((((()))(())()())()))(())))(())))())()()(())(()))()((()(()(())()()))(()())))))(()))(()()))(())(((((()(()(()()((())()())))))((())())((())(()(())((()))(())(((()((((((((()()()(()))()()(((()))()((()()(())(())())()(()(())))(((((()(())(())(()))))())()))(()))()(()(((((((()((((())))())())())())()((((((((((((((()()((((((()()()())())()())())())(())(())))())((()())((()(()))))))()))))))))))))))))())((())((())()()))))))(((()((()(()()))((())(()()))()()())))(())))))))(()(((())))())()())))()()(())()))()(()))())((()()))))(()))))()))(()()(())))))))()(((()))))()(()))(())())))))()))((()))((()))())(())))))))))((((())()))()))()))())(())()()(())))())))(()())()))((()()(())))(())((((((()(())((()(((()(()()(())))()))))))()))()(()((()))()(()))(()(((())((((())())(())(()))))))))())))))))())())))))())))))()()(((())()(()))))))))())))))(())()()()))()))()))(()(())()()())())))))))())()(()(()))))()()()))))())(()))))()()))))()())))))(((())()()))(()))))))))))()()))))()()()))))(()())())()()())()(()))))()(()))(())))))))(((((())(())())()()))()()))(())))))()(()))))(())(()()))()())()))()))()))()))))())()()))())())))(()))(()))))))())()(((())()))))))))()))()())))())))())))()))))))))))()()))(()()))))))(())()(()))))())(()))))(()))))(()())))))())())()()))))())()))))))))(()))))()))))))()(()())))))))()))())))())))())))())))))))())(()()))))))(()())())))()())()))))))))))))))())))()(())))()))())()()(())(()()))(())))())()())(()(()(()))))())))))))))))())(()))()))()))))(())()())()())))))))))))()()))))))))))))())())))))(()())))))))))))())(())))()))))))))())())(()))()))(())))()))()()(())()))))))()((((())()))())())))))()))()))))((()())()))))())))(())))))))))))))))))()))))()()())()))()()))))())()))((()())))())))(()))(()())))))))()))()))))(())))))))(())))))())()()(()))())()))()()))))())()()))))())()))())))))))(()))))()())()))))))))(()))())))(()))()))))(())()))())())(())())())))))))((((())))))()))()))()())()(())))()))()))()())(()())()()(()())()))))())())))))(()))()))))())(()()(())))))(())()()((())())))))(())(())))))))())))))))))()(())))))))()())())())()(()))))))))(()))))))))())()()))()(()))))))()))))))())))))))(())))()()(())()())))))(((())))()((())()))())))(()()))())(())())))()(((()())))))()(()()())))()()(()()(()()))())()(()()()))())()()))()())(()))))())))))())))(())()()))))(()))))(())(()))(())))))()()))()))))())()))()()(())())))((()))())()))))))()()))))((()(()))))()()))))))())))))())(()((()())))))))))))()())())))()))(()))))))(()))(())()())))(()))))))))())()()()()))))(()())))))))((())))()))(()))(())(())()())()))))))))(())))())))(()))()()))(()()))(()))())))()(())))())((()((()(())))((())))()))))((((())())()())))(())))()))))))())(()()((())))())()(()())))))(()())()))())))))))((())())))))))(()(()))())()()(()()(((()(((()())))))()))))))()(())(()()((()()(())()()))())()())()))()())())())))))))(((())))))))()()))))))(((())()))(()()))(()()))))(()(()()((((())()())((()()))))(()(())))))()((()()()())()()((()((()()))(()))(((()()()))(((())))()(((())()))))))((()(())())))(()())(((((()(()))(()((()))(()())()))))(()(()))()(()))(())(((())(()()))))()()))(((()))))(()()()()))())))((()()()(())()))()))))()()))()))))))((((((()()()))))())((()()(((()))))(()(())(()()())())())))()(((()()))(())((())))(()))(()()()())((())())())(()))))()))()((()(())()(()()(())(()))(())()))(())(()))))(())(())())(()()(()((()()((())))((()))()((())))(((()()()()((((()))(()()))()()()(((())((())())(()()(()()()))()((())(())()))())(((()()(())))()((()()())()())(()(())())(((())(())())((())(())()(((()()))(())))((())(()())())(())((()()()((((((())))((()(((((())()))()))(())(()()))()))(())()()))(())((()()())()()(()))())()((())))()((()()())((((()())((())())())((()((()))()))((())((()()(()((()()(((())(()()))))((()((())()(((())(()((())())((())(()((((((())())()(()())()(())(((())((((((()(())(()((()()()((()()(()()()())))()()(((((()()))()((((((()))()(()(()(()(((()())((()))())()((()))(())))()))()()))())()()))())((((())(()(()))(((((((())(((()(((((()(((()()((((())(((())())))(()()()(()(()))()))((((((()))((()(((()(())((()((((()((((((())(((((())))(((()(()))))(((()(((())()((())(()((()))(((()()(((())((((()(()(((((()))(((()(((((((()(()()()(()(()(()()())(())(((((()(())())()())(()(()(()))()(()()()())(()()(()((()))()((())())()(()))((())(()))()(()))()(((()(()(()((((((()()()()())()(((((()()(((()()()((()(((((()))((((((((()()()(((((()))))))(()()()(())(()))(()()))))(())()))(((((()(((((()()(()(()())(((()))((((()((()(()(()((()(()((())))()(((()((()))((()))(((((((((()((()((()(())))()((((()((()()))((())(((()(((((()()(()(()()((()(()()()(((((((())())()())))))((((()()(()))()))(()((())()(()(((((((((()()(((()(()())(()((()())((())())((((()(((()(((()((((()((()((((()(()((((((())((((((((((((()()(()()((((((((((((((()((()()))()((((((((((((())((((()(()())((()(()(()))()(((((()()(((()()))()())(())((()(((((()((())(((((()((()(((((()))()()((((())()((((())(((((((((()(())(()(())))())(()((())(((())(())(())())(()(()(())()()((()((())()(((()(((((()(())))()(((()((())))((()()()(((()(((()((()(()(())(()((()())(()(()(((()(((((((((())(()((((()()))(()((((()()()()(((()((((((((()(()()((((((()(()()(()((()((((((((((()()(((((((()())(())))(((()()))(((((()((()()())(()()((((())((()((((()))))(())((()(()()(((()(()(((()((((()(((((()))())())(()((())()))(((()())((())((())((((()((()((((((())(()((((()()))((((((())()(()))((()(((())((((((((((()()(((((()(((((()((()()()((((())))(()))()((()(())()()((()((((((((((()((())(())(((((()(()(()()))((((()((((()()((()(((()(((((((((()(()((()((()))((((((()(((())()()((()(((((((()())))()()(()((()((()()(((()(()()()()((((()((())((((()(((((((((()(((()()(((()(()(((()(((()((())()(()((()(()(()(()))()(((()))(()((((()((())((((())((((((())(()))(()((((())((()(()((((((((()()((((((()(()(()()()(())((()((()()(((()(((((((()()((()(((((((()))(((((()(((()(()()()(()(((()((()()((())(()(((((((((()(()((()((((((()()((())()))(((((()((())()())()(((((((((((()))((((()()()()())(()()(()(()()))()))(()))(()(((()()))())(()(()))()()((())(()())()())()(()))()))(()()(()((((((())((()(((((((((((()(())()((()(()((()((()(()((()((((((((((()()())((())()(())))((())()())()(((((()(()())((((()((()(())(()))(((())()((()))(((((())(()))()()(()))(((())((((()((((()(())))(((((((()))))())()())(())((())()(()()((()(()))()(()()(()()((()())((())((()()))((((()))()()))(()()(())()()(((((()(())((()((((()))()))(()())())(((()()(()()))(())))))(()))((())(((((()((((()))()((((()))()((())(((())))(((()())))((()(()()((

src/test/java/com/belellou/kevin/advent/year2015/Day1Test.java

@@ -0,0 +1,20 @@
+package com.belellou.kevin.advent.year2015;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class Day1Test {
+
+    private static final Day1 DAY_1 = new Day1();
+
+    @Test
+    public void testSolveFirstStar() {
+        assertThat(DAY_1.solveFirstStar()).isEqualTo(74);
+    }
+
+    @Test
+    public void testSolveSecondStar() {
+        assertThat(DAY_1.solveSecondStar()).isEqualTo(1795);
+    }
+}