Day 15 commit, not done
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2018/day15/day15-overthink
Normal file
203
2018/day15/day15-overthink
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@ -0,0 +1,203 @@
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package overthink
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import (
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"bufio"
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"fmt"
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"math"
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"os"
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"sort"
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"time"
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)
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const (
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UseEmoji = false
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MaxInt = int(^uint(0) >> 1)
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ClearScreen = "\033[H\033[2J"
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DIR_N = -1i
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DIR_E = 1
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DIR_S = 1i
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DIR_W = -1
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)
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var width int
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var input []byte
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var elves []*complex64
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var goblins []*complex64
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var allChars []*complex64
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var charMap map[complex64]*Character
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func main() {
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stdinToByteSlice()
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setupBattle()
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part1()
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}
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func part1() {
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//for {
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sortCharacters()
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printBattleField()
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for _, c := range allChars {
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charMap[*c].tick()
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}
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time.Sleep(time.Millisecond * 250)
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printBattleField()
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//}
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fmt.Println("")
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}
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func sortCharacters() {
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sort.Sort(ByPos(allChars))
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sort.Sort(ByPos(elves))
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sort.Sort(ByPos(goblins))
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}
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type Character struct {
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tp byte
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pos complex64
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power int
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health int
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}
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func (c *Character) tick() {
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// If we're already in range of a target, don't look for a new one
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var alreadyAtTarget bool
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var chosenTarget *complex64
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lowestTargetHp := MaxInt
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for _, v := range elves {
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if c.isAdjacentTo(*v) {
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if charMap[*v].health < lowestTargetHp {
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chosenTarget = v
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}
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alreadyAtTarget = true
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}
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}
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if alreadyAtTarget {
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// Attack the target
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charMap[*chosenTarget].health -= c.power
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} else {
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// Looking for a target
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if c.tp == 'G' {
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// First identify all possible targets (elves that have an open adjacent space)
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for _, v := range elves {
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}
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} else {
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// First identify all possible targets (goblins that have an open adjacent space)
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for _, v := range goblins {
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}
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}
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}
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}
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func (c *Character) isAdjacentTo(p complex64) bool {
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return c.pos+DIR_N == p || c.pos+DIR_E == p ||
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c.pos+DIR_S == p || c.pos+DIR_W == p
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}
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func (c *Character) hasOpenFlank() bool {
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}
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// Not sure if we'll use this...
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func manhattanDistance(p1, p2 complex64) int {
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x1, y1, x2, y2 := real(p1), imag(p1), real(p2), imag(p2)
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return int(math.Abs(float64(x1)-float64(x2)) + math.Abs(float64(y1)-float64(y2)))
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}
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// We have to sort the characters on each tick by y,x position
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// y is the imaginary part, x is the real part
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type ByPos []*complex64
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func (c ByPos) Len() int { return len(c) }
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func (c ByPos) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
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func (c ByPos) Less(i, j int) bool {
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return imag(*c[i]) < imag(*c[j]) ||
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(imag(*c[i]) == imag(*c[j]) && real(*c[i]) < real(*c[j]))
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}
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// getByte pulls a byte from the given position in the input
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func getByte(pos complex64) byte {
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return input[int(real(pos))+int(imag(pos))*width]
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}
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func setByte(pos complex64, b byte) {
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input[int(real(pos))+int(imag(pos))*width] = b
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}
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func getPosFromInt(i int) complex64 {
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return complex(float32(i%width), float32(i/width))
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}
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func printBattleField() {
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fmt.Print(ClearScreen)
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for i := 0; i < len(input); i++ {
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pos := getPosFromInt(i)
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var bt byte
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if c, ok := charMap[pos]; ok {
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if UseEmoji {
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switch c.tp {
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case 'G':
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if UseEmoji {
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fmt.Print("👺")
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}
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case 'E':
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fmt.Print("😃")
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}
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} else {
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fmt.Print(string(c.tp))
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}
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bt = c.tp
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} else {
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bt = getByte(pos)
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if UseEmoji {
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if bt == '#' {
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fmt.Print("🏿")
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} else {
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fmt.Print(" ")
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}
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} else {
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fmt.Print(string(bt))
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}
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}
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if i%width == width-1 {
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fmt.Println("")
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}
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}
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}
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func setupBattle() {
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charMap = make(map[complex64]*Character)
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for i := 0; i < len(input); i++ {
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pos := complex(float32(i%width), float32(i/width))
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bt := getByte(pos)
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if bt == 'G' || bt == 'E' {
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charMap[pos] = &Character{
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tp: bt,
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pos: pos,
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power: 3,
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health: 200,
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}
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setByte(pos, '.')
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allChars = append(allChars, &charMap[pos].pos)
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switch bt {
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case 'G':
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goblins = append(goblins, &charMap[pos].pos)
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case 'E':
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elves = append(elves, &charMap[pos].pos)
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}
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}
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}
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}
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func stdinToByteSlice() {
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scanner := bufio.NewScanner(os.Stdin)
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for scanner.Scan() {
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data := scanner.Bytes()
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if width == 0 {
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width = len(data)
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}
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input = append(input, data...)
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}
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}
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413
2018/day15/day15.go
Normal file
413
2018/day15/day15.go
Normal file
@ -0,0 +1,413 @@
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package main
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import (
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"bufio"
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"errors"
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"fmt"
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"math"
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"os"
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"sort"
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"time"
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)
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/*
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* 173327 is too low
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*/
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var input []byte
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var width int
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var characters map[complex64]*Character
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var charSlice []*complex64
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var turnCount int
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const (
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ClearScreen = "\033[H\033[2J"
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MaxInt = int(^uint(0) >> 1)
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DIR_N = -1i
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DIR_E = 1
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DIR_S = 1i
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DIR_W = -1
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)
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func main() {
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characters = make(map[complex64]*Character)
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stdinToByteSlice()
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setupBattle()
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part1()
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}
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func part1() {
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for {
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charSlice = charSlice[0:0]
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for i := 0; i < len(input); i++ {
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pos := getPosFromInt(i)
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bt := getByte(pos)
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if bt == 'G' || bt == 'E' {
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charSlice = append(charSlice, &pos)
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}
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}
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sort.Sort(ByPos(charSlice))
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fmt.Printf("= Turn %d =\n", turnCount)
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printBattlefield()
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for _, v := range charSlice {
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if char, ok := characters[*v]; ok {
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if !char.tick() {
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break
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}
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}
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}
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if false {
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time.Sleep(time.Millisecond * 250)
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}
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printBattlefield()
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if checkBattleOver() {
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break
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}
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turnCount++
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}
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var totalHP int
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sort.Sort(ByPos(charSlice))
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for _, v := range charSlice {
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if c, ok := characters[*v]; ok {
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fmt.Println(c.string())
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totalHP += c.health
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}
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}
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fmt.Println(turnCount, totalHP)
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fmt.Println("Result:", (totalHP * turnCount))
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}
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func checkBattleOver() bool {
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var elves, gobs int
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for _, v := range characters {
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if v.tp == 'E' {
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elves++
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} else if v.tp == 'G' {
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gobs++
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}
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}
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return elves == 0 || gobs == 0
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}
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type Character struct {
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tp byte
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health int
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power int
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pos complex64
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kills int
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}
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func (c *Character) hasEnemies() bool {
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for _, oppPos := range charSlice {
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if v, ok := characters[*oppPos]; ok {
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if v.tp != c.tp {
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return true
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}
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}
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}
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return false
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}
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func (c *Character) tick() bool {
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// If we're already in range of a target, don't look for a new one
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if tPos, err := c.easiestAdjacentTarget(); err == nil {
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c.attack(tPos)
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return c.hasEnemies()
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}
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// If we have no open sides, we can't more
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if !c.hasOpenFlank() {
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fmt.Println(c.string(), "blocked in")
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return true
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}
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// Otherwise, find a target
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var opportunities []complex64
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for _, oppPos := range charSlice {
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if v, ok := characters[*oppPos]; ok {
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if v.tp != c.tp {
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opportunities = append(opportunities, *oppPos)
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}
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}
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}
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/*
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var opportunities []complex64
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for _, oppPos := range charSlice {
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if v, ok := characters[*oppPos]; ok {
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if v.tp != c.tp {
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fmt.Println(c.string(), "checking:", v.string())
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opportunities = append(opportunities, v.getOpenSides()...)
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}
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}
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}
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closestDistance := MaxInt
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var closestPos complex64
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for _, v := range opportunities {
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if distance(c.pos, v) < closestDistance {
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closestDistance = distance(c.pos, v)
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closestPos = v
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}
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}
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*/
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// If there are no opportunities, we're done
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if len(opportunities) == 0 {
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fmt.Println(c.string(), "sees no opportunities")
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return true
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}
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var bestOpportunities []*complex64
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moves := make(map[complex64]complex64)
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bestDist := MaxInt
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for _, opp := range opportunities {
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paths := append([]pathPoint{}, pathPoint{
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pos: opp,
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count: 0,
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})
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move, length := findMove(c.pos, paths)
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if length < bestDist {
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bestOpportunities = append([]*complex64{}, &opp)
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for k := range moves {
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delete(moves, k)
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}
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moves[opp] = move
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bestDist = length
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} else if length == bestDist {
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bestOpportunities = append(bestOpportunities, &opp)
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moves[opp] = move
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}
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}
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sort.Sort(ByPos(bestOpportunities))
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//paths := append([]pathPoint{}, pathPoint{
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// pos: closestPos,
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// count: 0,
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//})
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//move := findMove(c.pos, paths)
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if len(bestOpportunities) > 0 {
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goWith := bestOpportunities[0]
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fmt.Println(c.string(),
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"moving to",
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getCoordString(moves[*goWith]),
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"(->",
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getCoordString(*goWith),
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bestDist, ")")
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c.moveTo(*goWith)
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} else {
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fmt.Println(c.string(), "can't find a path")
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}
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// After moving, check for an attack
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if tPos, err := c.easiestAdjacentTarget(); err == nil {
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c.attack(tPos)
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}
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return c.hasEnemies()
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}
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func (c *Character) string() string {
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return fmt.Sprintf("[%s%s:%d]", string(c.tp), getCoordString(c.pos), c.health)
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}
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func (c *Character) attack(p complex64) {
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fmt.Println(c.string(), "attacks", characters[p].string())
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characters[p].health -= c.power
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if characters[p].health <= 0 {
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c.kills++
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delete(characters, p)
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setByte(p, '.')
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}
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}
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func (c *Character) easiestAdjacentTarget() (complex64, error) {
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var wrk *Character
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if v, ok := characters[c.pos+DIR_N]; ok && v != nil && v.tp != c.tp {
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wrk = v
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}
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if v, ok := characters[c.pos+DIR_W]; ok && v != nil && v.tp != c.tp {
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if wrk == nil || v.health < wrk.health {
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wrk = v
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}
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}
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if v, ok := characters[c.pos+DIR_E]; ok && v != nil && v.tp != c.tp {
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if wrk == nil || v.health < wrk.health {
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wrk = v
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}
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}
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if v, ok := characters[c.pos+DIR_S]; ok && v != nil && v.tp != c.tp {
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if wrk == nil || v.health < wrk.health {
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wrk = v
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}
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}
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if wrk != nil {
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return wrk.pos, nil
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}
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return 0i, errors.New("No adjacent target")
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}
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func (c *Character) isAdjacentTo(p complex64) bool {
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return c.pos+DIR_N == p || c.pos+DIR_E == p ||
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c.pos+DIR_S == p || c.pos+DIR_W == p
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}
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func (c *Character) getOpenSides() []complex64 {
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var ret []complex64
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for _, d := range []complex64{DIR_N, DIR_W, DIR_E, DIR_S} {
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if getByte(c.pos+d) == '.' {
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ret = append(ret, c.pos+d)
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}
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}
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return ret
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}
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func (c *Character) hasOpenFlank() bool {
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for _, d := range []complex64{DIR_N, DIR_E, DIR_S, DIR_W} {
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if getByte(c.pos+d) == '.' {
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return true
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}
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}
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return false
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}
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func (c *Character) move(dir complex64) bool {
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if getByte(c.pos+dir) != '.' {
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return false
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}
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delete(characters, c.pos)
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setByte(c.pos, '.')
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c.pos += dir
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characters[c.pos] = c
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setByte(c.pos, c.tp)
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return true
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}
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func (c *Character) moveTo(pos complex64) bool {
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if getByte(pos) != '.' {
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return false
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}
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delete(characters, c.pos)
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setByte(c.pos, '.')
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c.pos = pos
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characters[c.pos] = c
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setByte(c.pos, c.tp)
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return true
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}
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func printBattlefield() {
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//fmt.Print(ClearScreen)
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for i := 0; i < len(input)/width; i++ {
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fmt.Println(string(input[i*width : (i+1)*width]))
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}
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}
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func setupBattle() {
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characters = make(map[complex64]*Character)
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for i := 0; i < len(input); i++ {
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pos := getPosFromInt(i)
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bt := getByte(pos)
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if bt == 'G' || bt == 'E' {
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characters[pos] = &Character{
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tp: bt,
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pos: pos,
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power: 3,
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health: 200,
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}
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charSlice = append(charSlice, &pos)
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}
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}
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}
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func isInMap(pos complex64) bool {
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idx := int(real(pos)) + int(imag(pos))*width
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return idx >= 0 && idx < len(input)
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}
|
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|
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// getByte pulls a byte from the given position in the input
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func getByte(pos complex64) byte {
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return input[int(real(pos))+int(imag(pos))*width]
|
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}
|
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|
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// setByte sets a byte in the input
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func setByte(pos complex64, b byte) {
|
||||
input[int(real(pos))+int(imag(pos))*width] = b
|
||||
}
|
||||
|
||||
func getPosFromInt(i int) complex64 {
|
||||
return complex(float32(i%width), float32(i/width))
|
||||
}
|
||||
|
||||
func getCoordString(p complex64) string {
|
||||
return fmt.Sprintf("(%d,%d)", int(real(p)), int(imag(p)))
|
||||
}
|
||||
|
||||
func stdinToByteSlice() {
|
||||
scanner := bufio.NewScanner(os.Stdin)
|
||||
for scanner.Scan() {
|
||||
data := scanner.Bytes()
|
||||
if width == 0 {
|
||||
width = len(data)
|
||||
}
|
||||
|
||||
input = append(input, data...)
|
||||
}
|
||||
}
|
||||
|
||||
// Returns the next move for the shortest path from p1 to p2
|
||||
type pathPoint struct {
|
||||
pos complex64
|
||||
count int
|
||||
}
|
||||
|
||||
func findMove(p1 complex64, paths []pathPoint) (complex64, int) {
|
||||
pathCount := len(paths)
|
||||
// First check if p1 has _any_ possible moves
|
||||
lowest := pathPoint{
|
||||
pos: 0 - 1i,
|
||||
count: MaxInt,
|
||||
}
|
||||
for _, v := range paths {
|
||||
for _, d := range []complex64{DIR_N, DIR_E, DIR_S, DIR_W} {
|
||||
wrkPt := pathPoint{
|
||||
pos: v.pos + d,
|
||||
count: v.count + 1,
|
||||
}
|
||||
if !isInMap(wrkPt.pos) {
|
||||
continue
|
||||
}
|
||||
if wrkPt.pos == p1 {
|
||||
if wrkPt.count < lowest.count {
|
||||
lowest.pos = v.pos
|
||||
lowest.count = v.count
|
||||
}
|
||||
}
|
||||
if getByte(wrkPt.pos) != '.' {
|
||||
continue
|
||||
}
|
||||
var skip bool
|
||||
for _, v2 := range paths {
|
||||
if v2.pos == wrkPt.pos && v2.count <= wrkPt.count {
|
||||
skip = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if skip {
|
||||
continue
|
||||
}
|
||||
paths = append(paths, wrkPt)
|
||||
}
|
||||
}
|
||||
if len(paths) != pathCount && lowest.count == MaxInt {
|
||||
return findMove(p1, paths)
|
||||
}
|
||||
// We hit the end, return the lowest part
|
||||
return lowest.pos, lowest.count
|
||||
}
|
||||
|
||||
// (Manhattan Distance, thanks earlier day)
|
||||
func distance(p1, p2 complex64) int {
|
||||
x1, y1, x2, y2 := real(p1), imag(p1), real(p2), imag(p2)
|
||||
return int(math.Abs(float64(x1)-float64(x2)) + math.Abs(float64(y1)-float64(y2)))
|
||||
}
|
||||
|
||||
type ByPos []*complex64
|
||||
|
||||
func (c ByPos) Len() int { return len(c) }
|
||||
func (c ByPos) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
|
||||
func (c ByPos) Less(i, j int) bool {
|
||||
return imag(*c[i]) < imag(*c[j]) ||
|
||||
(imag(*c[i]) == imag(*c[j]) && real(*c[i]) < real(*c[j]))
|
||||
}
|
||||
32
2018/day15/input
Normal file
32
2018/day15/input
Normal file
@ -0,0 +1,32 @@
|
||||
################################
|
||||
##########################..####
|
||||
#########################...####
|
||||
#########################..#####
|
||||
########################G..#####
|
||||
#####################.#.....##.#
|
||||
#####################..........#
|
||||
##############.#####...........#
|
||||
########G...G#.####............#
|
||||
#######......G....#.....#......#
|
||||
#######...G....GG.#............#
|
||||
#######G.G.............####....#
|
||||
#######.#.....#####....E.....###
|
||||
#######......#######.G.......###
|
||||
#..####..G..#########.###..#####
|
||||
#........G..#########.##########
|
||||
#..#..#G....#########.##########
|
||||
#.###...E...#########.##########
|
||||
#####...G.G.#########.##########
|
||||
########G....#######..##########
|
||||
####..........#####...##########
|
||||
####......E........G..##########
|
||||
#.G..................###########
|
||||
#G...................###########
|
||||
###.....##E.......E..###########
|
||||
###....#............############
|
||||
###.................############
|
||||
##G.....#.............##########
|
||||
###########...#E..##..##########
|
||||
###########.E...###.E.EE.#######
|
||||
###########......#.......#######
|
||||
################################
|
||||
7
2018/day15/testinput1
Normal file
7
2018/day15/testinput1
Normal file
@ -0,0 +1,7 @@
|
||||
#######
|
||||
#G..#E#
|
||||
#E#E.E#
|
||||
#G.##.#
|
||||
#...#E#
|
||||
#...E.#
|
||||
#######
|
||||
7
2018/day15/testinput2
Normal file
7
2018/day15/testinput2
Normal file
@ -0,0 +1,7 @@
|
||||
#######
|
||||
#E..EG#
|
||||
#.#G.E#
|
||||
#E.##E#
|
||||
#G..#.#
|
||||
#..E#.#
|
||||
#######
|
||||
7
2018/day15/testinput3
Normal file
7
2018/day15/testinput3
Normal file
@ -0,0 +1,7 @@
|
||||
#######
|
||||
#E.G#.#
|
||||
#.#G..#
|
||||
#G.#.G#
|
||||
#G..#.#
|
||||
#...E.#
|
||||
#######
|
||||
7
2018/day15/testinput4
Normal file
7
2018/day15/testinput4
Normal file
@ -0,0 +1,7 @@
|
||||
#######
|
||||
#.E...#
|
||||
#.#..G#
|
||||
#.###.#
|
||||
#E#G#G#
|
||||
#...#G#
|
||||
#######
|
||||
9
2018/day15/testinput5
Normal file
9
2018/day15/testinput5
Normal file
@ -0,0 +1,9 @@
|
||||
#########
|
||||
#G......#
|
||||
#.E.#...#
|
||||
#..##..G#
|
||||
#...##..#
|
||||
#...#...#
|
||||
#.G...G.#
|
||||
#.....G.#
|
||||
#########
|
||||
Loading…
Reference in New Issue
Block a user