Switching pcs

2018/day23/day23.go

@@ -0,0 +1,103 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"math"
+	"os"
+	"strconv"
+	"strings"
+)
+
+var collective *Collective
+
+func main() {
+	input := stdinToStringSlice()
+
+	collective = &Collective{}
+	for _, v := range input {
+		collective.bots = append(collective.bots, NewBot(v))
+	}
+	part1()
+}
+
+func part1() {
+	s := collective.strongest()
+	fmt.Println("= Part 1 =")
+	fmt.Println(len(collective.inRange(s)))
+}
+
+func part2() {
+	finder := &Bot{}
+}
+
+type Collective struct {
+	bots []*Bot
+}
+
+func (c *Collective) inRange(b *Bot) []*Bot {
+	var ret []*Bot
+	for _, v := range c.bots {
+		if c.distance(b, v) <= b.radius {
+			ret = append(ret, v)
+		}
+	}
+	return ret
+}
+
+func (c *Collective) strongest() *Bot {
+	strongest := c.bots[0]
+	for _, v := range c.bots {
+		if v.radius > strongest.radius {
+			strongest = v
+		}
+	}
+	return strongest
+}
+
+func (c *Collective) distance(b1, b2 *Bot) int {
+	xs := math.Abs(float64(b1.x) - float64(b2.x))
+	ys := math.Abs(float64(b1.y) - float64(b2.y))
+	zs := math.Abs(float64(b1.z) - float64(b2.z))
+	return int(xs + ys + zs)
+}
+
+type Bot struct {
+	x, y, z int
+	radius  int
+}
+
+func NewBot(args string) *Bot {
+	pts := strings.Split(args, ", ")
+	pos := strings.Split(pts[0][5:len(pts[0])-1], ",")
+	r := strings.Split(pts[1], "=")[1]
+	return &Bot{
+		x:      atoi(pos[0]),
+		y:      atoi(pos[1]),
+		z:      atoi(pos[2]),
+		radius: atoi(r),
+	}
+}
+
+func (b *Bot) string() string {
+	return fmt.Sprintf("(%d,%d,%d : %d)", b.x, b.y, b.z, b.radius)
+}
+
+func stdinToStringSlice() []string {
+	var input []string
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		input = append(input, scanner.Text())
+	}
+	return input
+}
+
+func atoi(i string) int {
+	var ret int
+	var err error
+	if ret, err = strconv.Atoi(i); err != nil {
+		log.Fatal("Invalid Atoi")
+	}
+	return ret
+}

2018/day23/testinput

@@ -0,0 +1,9 @@
+pos=<0,0,0>, r=4
+pos=<1,0,0>, r=1
+pos=<4,0,0>, r=3
+pos=<0,2,0>, r=1
+pos=<0,5,0>, r=3
+pos=<0,0,3>, r=1
+pos=<1,1,1>, r=1
+pos=<1,1,2>, r=1
+pos=<1,3,1>, r=1