~macaptain/advent-of-code

43fbd433833df9e2c75d9113ed64e7156048fd0b — Michael Captain 2 months ago 03b30ea master
Complete 2019 Day 21
M src/main/advent2019/Day17.kt => src/main/advent2019/Day17.kt +10 -23
@@ 2,13 2,6 @@ package advent2019

import common.Point

fun asciiOutput(output: List<Int>): List<String> {
    val cameraWidth = output.indexOf(10)
    return output.filterNot { it == 10 }.chunked(cameraWidth).map { line ->
        line.map { asciiCode -> Char(asciiCode) }.joinToString("")
    }
}

fun scaffoldIntersections(camera: List<String>): Set<Point> {
    val intersections = mutableSetOf<Point>()
    camera.forEachIndexed { j, row ->


@@ 193,17 186,16 @@ fun compressInstructions(instructions: List<String>): CompressedInstructions {

fun solve17a(program: String): Int {
    val computer = runProgram(program)
    val output = computer.outputs().map { it.toInt() }.toList()
    val camera = asciiOutput(output)
    val camera = computer.asciiOutput()
    return alignmentParameters(camera)
}

fun solve17b(program: String): Int {
    val robotProgram = wakeVacuumRobotProgram(program)
    val computer = runProgram(robotProgram)
    val output1 = computer.outputs().map { it.toInt() }.toList()
    val camera1 = asciiOutput(output1).dropLast(1)
    var prompt = asciiOutput(output1).last()
    val asciiOutput = computer.asciiOutput()
    val camera1 = asciiOutput.dropLast(1)
    var prompt = asciiOutput.last()
    check(prompt == "Main:")
    val instructions = cleaningInstructions(camera1)
    val compressedInstructions = compressInstructions(instructions)


@@ 211,39 203,34 @@ fun solve17b(program: String): Int {
    val mainAscii = compressedInstructions.mainAscii()
    mainAscii.forEach { computer.input(it) }
    computer.run()
    val output2 = computer.outputs().map { it.toInt() }.toList()
    prompt = asciiOutput(output2).last()
    prompt = computer.asciiOutput().last()
    check(prompt == "Function A:")

    val aAscii = compressedInstructions.aAscii()
    aAscii.forEach { computer.input(it) }
    computer.run()
    val output3 = computer.outputs().map { it.toInt() }.toList()
    prompt = asciiOutput(output3).last()
    prompt = computer.asciiOutput().last()
    check(prompt == "Function B:")

    val bAscii = compressedInstructions.bAscii()
    bAscii.forEach { computer.input(it) }
    computer.run()
    val output4 = computer.outputs().map { it.toInt() }.toList()
    prompt = asciiOutput(output4).last()
    prompt = computer.asciiOutput().last()
    check(prompt == "Function C:")

    val cAscii = compressedInstructions.cAscii()
    cAscii.forEach { computer.input(it) }
    computer.run()
    val output5 = computer.outputs().map { it.toInt() }.toList()
    prompt = asciiOutput(output5).last()
    prompt = computer.asciiOutput().last()
    check(prompt == "Continuous video feed?")

    computer.input('n'.code)
    computer.input('\n'.code)
    computer.run()

    val output6 = computer.outputs().map { it.toInt() }.toList()
    val camera2 = asciiOutput(output6.drop(1).dropLast(1))
    val camera2 = computer.asciiOutput()

    return output6.last()
    return computer.output()!!.toInt()
}

fun main() {

A src/main/advent2019/Day21.kt => src/main/advent2019/Day21.kt +49 -0
@@ 0,0 1,49 @@
package advent2019

fun solve21a(program: String): Int {
    val computer = runProgram(program)
    var asciiOutput = computer.asciiOutput()
    check(asciiOutput == listOf("Input instructions:"))
    computer
        .asciiInput("NOT A T")
        .asciiInput("NOT B J")
        .asciiInput("OR T J")
        .asciiInput("NOT C T")
        .asciiInput("OR T J")
        // if D is false, never jump, or we jump into a hole
        .asciiInput("AND D J")
        .asciiInput("WALK")
        .run()
    asciiOutput = computer.asciiOutput()
    return computer.output()!!.toInt()
}

fun solve21b(program: String): Int {
    val computer = runProgram(program)
    var asciiOutput = computer.asciiOutput()
    check(asciiOutput == listOf("Input instructions:"))
    computer
        .asciiInput("NOT A T")
        .asciiInput("NOT B J")
        .asciiInput("OR T J")
        .asciiInput("NOT C T")
        .asciiInput("OR T J")
        // we can assume D is true, since if D is false, we don't jump later, hence assume here T is false
        .asciiInput("NOT D T")
        .asciiInput("OR H T")
        .asciiInput("OR E T")
        // now jump only if we have ground 5 away or 8 away to avoid being forced onto a 1 length platform and jumping into a hole 8 away
        .asciiInput("AND T J")
        // if D is false, never jump, or we jump into a hole 4 away
        .asciiInput("AND D J")
        .asciiInput("RUN")
        .run()
    asciiOutput = computer.asciiOutput()
    return computer.output()!!.toInt()
}

fun main() {
    val program = input("day21").first()
    println(solve21a(program)) // 19353565
    println(solve21b(program)) // 1140612950
}
\ No newline at end of file

M src/main/advent2019/Intcode.kt => src/main/advent2019/Intcode.kt +23 -13
@@ 1,21 1,17 @@
package advent2019

import common.chunkWhen
import java.util.*

typealias Intcode = List<Long>
typealias IntcodeMemory = LongArray

enum class Opcode(val value: Long, val arity: Int) {
    ADD(1, 3),
    MULTIPLY(2, 3),
    INPUT(3, 1),
    OUTPUT(4, 1),
    JUMP_IF_TRUE(5, 2),
    JUMP_IF_FALSE(6, 2),
    LESS_THAN(7, 3),
    EQUALS(8, 3),
    SET_RELATIVE_BASE(9, 1),
    HALT(99, 0);
    ADD(1, 3), MULTIPLY(2, 3), INPUT(3, 1), OUTPUT(4, 1), JUMP_IF_TRUE(5, 2), JUMP_IF_FALSE(6, 2), LESS_THAN(
        7,
        3
    ),
    EQUALS(8, 3), SET_RELATIVE_BASE(9, 1), HALT(99, 0);

    companion object {
        fun from(value: Long) = values().first { it.value == value }


@@ 23,9 19,7 @@ enum class Opcode(val value: Long, val arity: Int) {
}

enum class ParameterMode(val value: Long) {
    POSITION(0),
    IMMEDIATE(1),
    RELATIVE(2);
    POSITION(0), IMMEDIATE(1), RELATIVE(2);

    companion object {
        fun from(value: Long) = values().first { it.value == value }


@@ 36,6 30,7 @@ const val INTCODE_MAX_MEMORY = 4096

class IntcodeComputer(code: Intcode) {
    constructor (program: String) : this(program.toIntcode())

    private val mem = code.toLongArray().copyOf(INTCODE_MAX_MEMORY)
    private var ip = 0
    private var relativeBase = 0


@@ 54,8 49,23 @@ class IntcodeComputer(code: Intcode) {
        return this
    }

    fun asciiInput(s: String): IntcodeComputer {
        s.map { it.code }.forEach { input(it) }
        input('\n'.code)
        return this
    }


    fun output(): Long? = if (outputs.isNotEmpty()) outputs.removeFirst() else null
    fun outputs() = generateSequence { output() }
    fun asciiOutput(): List<String> {
        return outputs.takeWhile { it < Char.MAX_VALUE.code }
            .map { outputs.removeFirst(); Char(it.toInt()) }
            .joinToString("")
            .split("\n")
            .filter { it.isNotBlank() }
    }

    fun isHalted() = halt

    private fun next() {

A src/main/resources/advent2019/day21_input.txt => src/main/resources/advent2019/day21_input.txt +1 -0
@@ 0,0 1,1 @@
109,2050,21101,0,966,1,21102,1,13,0,1105,1,1378,21101,0,20,0,1106,0,1337,21101,0,27,0,1106,0,1279,1208,1,65,748,1005,748,73,1208,1,79,748,1005,748,110,1208,1,78,748,1005,748,132,1208,1,87,748,1005,748,169,1208,1,82,748,1005,748,239,21102,1041,1,1,21101,73,0,0,1105,1,1421,21101,78,0,1,21102,1041,1,2,21102,1,88,0,1105,1,1301,21101,0,68,1,21101,1041,0,2,21102,1,103,0,1106,0,1301,1101,0,1,750,1106,0,298,21102,1,82,1,21101,1041,0,2,21101,0,125,0,1106,0,1301,1101,0,2,750,1105,1,298,21101,0,79,1,21101,1041,0,2,21102,147,1,0,1106,0,1301,21101,84,0,1,21102,1041,1,2,21102,162,1,0,1105,1,1301,1101,3,0,750,1106,0,298,21101,0,65,1,21101,1041,0,2,21101,184,0,0,1106,0,1301,21101,76,0,1,21101,1041,0,2,21102,199,1,0,1106,0,1301,21102,1,75,1,21101,0,1041,2,21101,0,214,0,1106,0,1301,21102,221,1,0,1106,0,1337,21101,10,0,1,21101,0,1041,2,21101,0,236,0,1105,1,1301,1106,0,553,21101,0,85,1,21102,1,1041,2,21102,1,254,0,1105,1,1301,21101,0,78,1,21101,1041,0,2,21102,1,269,0,1106,0,1301,21101,276,0,0,1106,0,1337,21101,10,0,1,21101,1041,0,2,21101,291,0,0,1106,0,1301,1102,1,1,755,1106,0,553,21102,1,32,1,21101,0,1041,2,21102,313,1,0,1106,0,1301,21101,320,0,0,1106,0,1337,21102,1,327,0,1106,0,1279,2102,1,1,749,21101,65,0,2,21101,0,73,3,21102,346,1,0,1105,1,1889,1206,1,367,1007,749,69,748,1005,748,360,1102,1,1,756,1001,749,-64,751,1106,0,406,1008,749,74,748,1006,748,381,1101,0,-1,751,1105,1,406,1008,749,84,748,1006,748,395,1102,1,-2,751,1105,1,406,21102,1100,1,1,21102,406,1,0,1105,1,1421,21101,32,0,1,21101,1100,0,2,21101,0,421,0,1105,1,1301,21101,428,0,0,1105,1,1337,21101,435,0,0,1105,1,1279,2101,0,1,749,1008,749,74,748,1006,748,453,1101,0,-1,752,1105,1,478,1008,749,84,748,1006,748,467,1101,0,-2,752,1105,1,478,21102,1168,1,1,21101,478,0,0,1105,1,1421,21102,1,485,0,1106,0,1337,21102,1,10,1,21101,1168,0,2,21102,1,500,0,1106,0,1301,1007,920,15,748,1005,748,518,21101,0,1209,1,21102,1,518,0,1105,1,1421,1002,920,3,529,1001,529,921,529,1001,750,0,0,1001,529,1,537,1001,751,0,0,1001,537,1,545,102,1,752,0,1001,920,1,920,1105,1,13,1005,755,577,1006,756,570,21101,1100,0,1,21101,0,570,0,1106,0,1421,21101,0,987,1,1105,1,581,21102,1001,1,1,21102,1,588,0,1106,0,1378,1102,1,758,594,102,1,0,753,1006,753,654,21002,753,1,1,21102,1,610,0,1106,0,667,21101,0,0,1,21101,0,621,0,1105,1,1463,1205,1,647,21101,0,1015,1,21101,635,0,0,1105,1,1378,21102,1,1,1,21101,646,0,0,1105,1,1463,99,1001,594,1,594,1105,1,592,1006,755,664,1102,0,1,755,1106,0,647,4,754,99,109,2,1102,1,726,757,22102,1,-1,1,21102,1,9,2,21101,697,0,3,21101,0,692,0,1105,1,1913,109,-2,2105,1,0,109,2,101,0,757,706,2101,0,-1,0,1001,757,1,757,109,-2,2106,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,255,63,95,159,191,223,127,0,109,152,253,182,236,231,212,42,69,154,142,196,86,214,120,166,139,175,117,102,178,124,204,189,59,156,244,92,110,184,241,87,220,245,122,167,227,53,50,197,93,85,234,190,252,248,54,163,217,94,207,58,115,70,99,71,188,247,168,221,116,239,155,186,232,49,213,218,137,103,56,170,119,34,242,76,169,173,46,172,187,171,141,153,238,61,125,121,222,199,243,174,229,235,226,201,215,108,138,126,78,249,62,51,79,57,118,181,38,39,84,228,55,77,113,179,107,136,198,140,35,246,205,162,219,43,68,185,111,237,100,183,47,157,98,230,114,158,202,216,203,200,206,106,233,254,143,60,251,101,250,177,123,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,20,73,110,112,117,116,32,105,110,115,116,114,117,99,116,105,111,110,115,58,10,13,10,87,97,108,107,105,110,103,46,46,46,10,10,13,10,82,117,110,110,105,110,103,46,46,46,10,10,25,10,68,105,100,110,39,116,32,109,97,107,101,32,105,116,32,97,99,114,111,115,115,58,10,10,58,73,110,118,97,108,105,100,32,111,112,101,114,97,116,105,111,110,59,32,101,120,112,101,99,116,101,100,32,115,111,109,101,116,104,105,110,103,32,108,105,107,101,32,65,78,68,44,32,79,82,44,32,111,114,32,78,79,84,67,73,110,118,97,108,105,100,32,102,105,114,115,116,32,97,114,103,117,109,101,110,116,59,32,101,120,112,101,99,116,101,100,32,115,111,109,101,116,104,105,110,103,32,108,105,107,101,32,65,44,32,66,44,32,67,44,32,68,44,32,74,44,32,111,114,32,84,40,73,110,118,97,108,105,100,32,115,101,99,111,110,100,32,97,114,103,117,109,101,110,116,59,32,101,120,112,101,99,116,101,100,32,74,32,111,114,32,84,52,79,117,116,32,111,102,32,109,101,109,111,114,121,59,32,97,116,32,109,111,115,116,32,49,53,32,105,110,115,116,114,117,99,116,105,111,110,115,32,99,97,110,32,98,101,32,115,116,111,114,101,100,0,109,1,1005,1262,1270,3,1262,20102,1,1262,0,109,-1,2106,0,0,109,1,21102,1288,1,0,1105,1,1263,20101,0,1262,0,1101,0,0,1262,109,-1,2106,0,0,109,5,21102,1,1310,0,1106,0,1279,22102,1,1,-2,22208,-2,-4,-1,1205,-1,1332,21201,-3,0,1,21101,0,1332,0,1106,0,1421,109,-5,2106,0,0,109,2,21101,0,1346,0,1105,1,1263,21208,1,32,-1,1205,-1,1363,21208,1,9,-1,1205,-1,1363,1106,0,1373,21101,1370,0,0,1106,0,1279,1105,1,1339,109,-2,2106,0,0,109,5,1201,-4,0,1385,21001,0,0,-2,22101,1,-4,-4,21102,0,1,-3,22208,-3,-2,-1,1205,-1,1416,2201,-4,-3,1408,4,0,21201,-3,1,-3,1106,0,1396,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