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Day 1

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Bas Dado
2018-12-01 17:13:04 +01:00
commit 2cd5fbcbf4
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.gitignore vendored Normal file
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# Eclipse
.classpath
.project
.settings/
# Intellij
.idea/
*.iml
*.iws
# Mac
.DS_Store
# Maven
log/
target/

69
pom.xml Normal file
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<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.basdado.adventofcode</groupId>
<artifactId>adventofcode2019</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>com.basdado.adventofcode adventofcode2019</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kotlin.version>1.3.10</kotlin.version>
<kotlin.code.style>official</kotlin.code.style>
<junit.version>4.12</junit.version>
</properties>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-test-junit</artifactId>
<version>${kotlin.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/kotlin</sourceDirectory>
<testSourceDirectory>src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

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src/main/kotlin/com/basdado/adventofcode/Day1.kt Normal file
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import java.nio.file.Files
import java.nio.file.Paths
import java.util.stream.Collectors
fun main() {
puzzle1()
puzzle2()
}
fun puzzle1() {
println(
Files.lines(Paths.get(Day1::class.java.getResource("/day/1/input.txt").toURI()))
.mapToLong { it.toLong() }
.sum())
}
fun puzzle2() {
val changes = Files.lines(Paths.get(Day1::class.java.getResource("/day/1/input.txt").toURI()))
.map { it.toLong() }
.collect(Collectors.toList<Long>())
val freqs = mutableSetOf(0L)
var freq = 0L
while(true) {
for (change in changes) {
freq += change
if (freqs.contains(freq)) {
println(freq)
return
}
freqs.add(freq)
}
}
}
class Day1

959
src/main/resources/day/1/input.txt Normal file
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