2022 Day 15, part 1 complete
Going home from C&C
This commit is contained in:
parent
194d2875a8
commit
c23342023b
@ -13,17 +13,55 @@ var sleepTime = (time.Second / 5)
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var minx, miny, maxx, maxy int
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var part = -1
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var knots = 2
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func main() {
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inp := h.StdinToStringSlice()
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watch := len(os.Args) > 1 && strings.HasPrefix(os.Args[1], "-w")
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if watch {
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if strings.Contains(os.Args[1], "=") {
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pts := strings.Split(os.Args[1], "=")
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sleepTime = (time.Second / time.Duration(h.Atoi(pts[1])))
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var watch bool
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var partSet bool
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if len(os.Args) > 1 {
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for _, arg := range os.Args[1:] {
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if strings.HasPrefix(arg, "-w") {
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watch = true
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if strings.Contains(arg, "=") {
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pts := strings.Split(arg, "=")
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sleepTime = (time.Second / time.Duration(h.Atoi(pts[1])))
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}
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} else if strings.HasPrefix(arg, "-k") {
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if strings.Contains(arg, "=") {
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pts := strings.Split(arg, "=")
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knots = h.Atoi(pts[1])
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}
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} else if strings.HasPrefix(arg, "-p") {
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partSet = true
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if strings.Contains(arg, "=") {
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pts := strings.Split(arg, "=")
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part = h.Atoi(pts[1])
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}
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}
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}
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}
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simulate(inp, 10, watch)
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if part == 1 {
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knots = 2
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} else if part == 2 {
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knots = 10
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}
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if !watch && !partSet {
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// Run both parts
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fmt.Println("# Part 1")
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simulate(inp, 2, watch)
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fmt.Println()
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fmt.Println("# Part 2")
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simulate(inp, 10, watch)
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} else {
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if part > 0 && part <= 2 {
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fmt.Println("# Part", part)
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} else {
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fmt.Println("# Simulation with", knots, "knots")
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}
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simulate(inp, knots, watch)
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}
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}
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func buildInstructions(inp []string) []byte {
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@ -48,7 +86,6 @@ func simulate(inp []string, knotCount int, watch bool) {
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knots = append(knots, h.Coordinate{X: 0, Y: 0})
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}
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if watch {
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fmt.Println("# Part 1")
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printVisits(visited, knots)
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}
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for i, dir := range inst {
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@ -57,7 +94,7 @@ func simulate(inp []string, knotCount int, watch bool) {
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if watch {
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time.Sleep(sleepTime)
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fmt.Print(h.CLEAR_SCREEN)
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fmt.Printf("# Part 1 (%d/%d)\n", i, len(inst))
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fmt.Printf("# Knots %d (%d/%d)\n", knots, i, len(inst))
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printVisits(visited, knots)
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}
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}
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@ -65,7 +102,6 @@ func simulate(inp []string, knotCount int, watch bool) {
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time.Sleep(sleepTime)
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fmt.Print(h.CLEAR_SCREEN)
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}
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fmt.Println("# Part 1")
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if watch {
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printVisits(visited, knots)
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}
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34
2022/day15/input
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34
2022/day15/input
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@ -0,0 +1,34 @@
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Sensor at x=3842919, y=126080: closest beacon is at x=3943893, y=1918172
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Sensor at x=406527, y=2094318: closest beacon is at x=-1066, y=1333278
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Sensor at x=2208821, y=3683408: closest beacon is at x=2914373, y=3062268
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Sensor at x=39441, y=1251806: closest beacon is at x=-1066, y=1333278
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Sensor at x=3093352, y=2404566: closest beacon is at x=2810772, y=2699609
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Sensor at x=3645473, y=2234498: closest beacon is at x=3943893, y=1918172
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Sensor at x=3645012, y=2995540: closest beacon is at x=4001806, y=2787325
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Sensor at x=18039, y=3083937: closest beacon is at x=103421, y=3007511
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Sensor at x=2375680, y=551123: closest beacon is at x=2761373, y=2000000
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Sensor at x=776553, y=123250: closest beacon is at x=-1066, y=1333278
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Sensor at x=2884996, y=2022644: closest beacon is at x=2761373, y=2000000
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Sensor at x=1886537, y=2659379: closest beacon is at x=2810772, y=2699609
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Sensor at x=3980015, y=3987237: closest beacon is at x=3844688, y=3570059
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Sensor at x=3426483, y=3353349: closest beacon is at x=3844688, y=3570059
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Sensor at x=999596, y=1165648: closest beacon is at x=-1066, y=1333278
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Sensor at x=2518209, y=2287271: closest beacon is at x=2761373, y=2000000
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Sensor at x=3982110, y=3262128: closest beacon is at x=3844688, y=3570059
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Sensor at x=3412896, y=3999288: closest beacon is at x=3844688, y=3570059
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Sensor at x=2716180, y=2798731: closest beacon is at x=2810772, y=2699609
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Sensor at x=3575486, y=1273265: closest beacon is at x=3943893, y=1918172
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Sensor at x=7606, y=2926795: closest beacon is at x=103421, y=3007511
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Sensor at x=2719370, y=2062251: closest beacon is at x=2761373, y=2000000
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Sensor at x=1603268, y=1771299: closest beacon is at x=2761373, y=2000000
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Sensor at x=3999678, y=1864727: closest beacon is at x=3943893, y=1918172
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Sensor at x=3157947, y=2833781: closest beacon is at x=2914373, y=3062268
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Sensor at x=3904662, y=2601010: closest beacon is at x=4001806, y=2787325
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Sensor at x=3846359, y=1608423: closest beacon is at x=3943893, y=1918172
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Sensor at x=2831842, y=3562642: closest beacon is at x=2914373, y=3062268
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Sensor at x=3157592, y=1874755: closest beacon is at x=2761373, y=2000000
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Sensor at x=934300, y=2824967: closest beacon is at x=103421, y=3007511
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Sensor at x=3986911, y=1907590: closest beacon is at x=3943893, y=1918172
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Sensor at x=200888, y=3579976: closest beacon is at x=103421, y=3007511
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Sensor at x=967209, y=3837958: closest beacon is at x=103421, y=3007511
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Sensor at x=3998480, y=1972726: closest beacon is at x=3943893, y=1918172
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127
2022/day15/main.go
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127
2022/day15/main.go
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@ -0,0 +1,127 @@
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package main
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import (
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"fmt"
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"math"
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"os"
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"strings"
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h "git.bullercodeworks.com/brian/adventofcode/helpers"
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)
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var part = -1
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var testRow = 2000000
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var watch bool
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var watchRows = 1
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func main() {
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inp := h.StdinToStringSlice()
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if len(os.Args) > 1 {
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for _, arg := range os.Args[1:] {
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if strings.HasPrefix(arg, "--part") || strings.HasPrefix(arg, "-p") {
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if strings.Contains(arg, "=") {
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pts := strings.Split(arg, "=")
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part = h.Atoi(pts[1])
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}
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} else if strings.HasPrefix(arg, "--row") || strings.HasPrefix(arg, "-r") {
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if strings.Contains(arg, "=") {
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pts := strings.Split(arg, "=")
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testRow = h.Atoi(pts[1])
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}
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} else if strings.HasPrefix(arg, "--watch") || strings.HasPrefix(arg, "-w") {
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watch = true
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if strings.Contains(arg, "=") {
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pts := strings.Split(arg, "=")
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if pts[1] == "full" {
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watchRows = -1
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} else {
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watchRows = h.Atoi(pts[1])
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}
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}
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}
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}
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}
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part1(inp)
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part2(inp)
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}
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func part1(inp []string) {
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min_x, max_x := math.MaxInt, math.MinInt
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var spots [][]int
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for i := range inp {
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s, b := strToCoords(inp[i])
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xs, ys, xb, yb := s.X, s.Y, b.X, b.Y
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dist := s.Distance(b)
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l, r := xs-dist, xs+dist
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min_x = h.Min(min_x, l)
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max_x = h.Max(max_x, r)
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spots = append(spots, []int{xs, ys, xb, yb, dist})
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}
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var nopeCount int
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for x := min_x; x <= max_x; x++ {
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for _, c := range spots {
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if x == c[2] && testRow == c[3] {
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break
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}
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if h.ManhattanDistance(x, testRow, c[0], c[1]) <= c[4] {
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nopeCount++
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break
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}
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}
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}
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fmt.Println("# Part 1")
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fmt.Println(nopeCount)
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}
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func part2(inp []string) {
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min_x, max_x := math.MaxInt, math.MinInt
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var spots [][]int
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for i := range inp {
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s, b := strToCoords(inp[i])
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xs, ys, xb, yb := s.X, s.Y, b.X, b.Y
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dist := s.Distance(b)
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l, r := xs-dist, xs+dist
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min_x = h.Min(min_x, l)
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max_x = h.Max(max_x, r)
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spots = append(spots, []int{xs, ys, xb, yb, dist})
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}
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max := testRow * 2
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var found h.Coordinate
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SEARCH:
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for y := 0; y <= max; y++ {
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for x := 0; x <= max; x++ {
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fmt.Printf("Testing %d,%d...", x, y)
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var nope bool
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for _, c := range spots {
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if x == c[2] && y == c[3] {
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break
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}
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if h.ManhattanDistance(x, y, c[0], c[1]) <= c[4] {
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nope = true
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break
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}
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}
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if !nope {
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fmt.Println("Yup")
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found = h.Coordinate{X: x, Y: y}
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break SEARCH
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}
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fmt.Println("Nope")
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}
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}
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fmt.Println("# Part 2")
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fmt.Println(found)
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fmt.Println((found.X * 4000000) + found.Y)
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}
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func printMap(m [][]int) {
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}
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func strToCoords(s string) (h.Coordinate, h.Coordinate) {
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var sensor, beacon h.Coordinate
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r := strings.NewReader(s)
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fmt.Fscanf(r, "Sensor at x=%d, y=%d: closest beacon is at x=%d, y=%d", &sensor.X, &sensor.Y, &beacon.X, &beacon.Y)
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return sensor, beacon
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}
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171
2022/day15/problem
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171
2022/day15/problem
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@ -0,0 +1,171 @@
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Advent of Code
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• [About]
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• [Events]
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• [Shop]
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• [Settings]
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• [Log Out]
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br0xen (AoC++) 28*
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<y>2022</y>
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• [Calendar]
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• [AoC++]
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• [Sponsors]
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• [Leaderboard]
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• [Stats]
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Our sponsors help make Advent of Code possible:
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BJSS - Our people are a team of problem solvers, experienced in evolving technologies and delivering
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world-class technology solutions.
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--- Day 15: Beacon Exclusion Zone ---
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You feel the ground rumble again as the distress signal leads you to a large network of subterranean tunnels.
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You don't have time to search them all, but you don't need to: your pack contains a set of deployable sensors
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that you imagine were originally built to locate lost Elves.
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The sensors aren't very powerful, but that's okay; your handheld device indicates that you're close enough to
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the source of the distress signal to use them. You pull the emergency sensor system out of your pack, hit the
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big button on top, and the sensors zoom off down the tunnels.
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Once a sensor finds a spot it thinks will give it a good reading, it attaches itself to a hard surface and
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begins monitoring for the nearest signal source beacon. Sensors and beacons always exist at integer
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coordinates. Each sensor knows its own position and can determine the position of a beacon precisely; however,
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sensors can only lock on to the one beacon closest to the sensor as measured by the Manhattan distance. (There
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is never a tie where two beacons are the same distance to a sensor.)
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It doesn't take long for the sensors to report back their positions and closest beacons (your puzzle input).
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For example:
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Sensor at x=2, y=18: closest beacon is at x=-2, y=15
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Sensor at x=9, y=16: closest beacon is at x=10, y=16
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Sensor at x=13, y=2: closest beacon is at x=15, y=3
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Sensor at x=12, y=14: closest beacon is at x=10, y=16
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Sensor at x=10, y=20: closest beacon is at x=10, y=16
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Sensor at x=14, y=17: closest beacon is at x=10, y=16
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Sensor at x=8, y=7: closest beacon is at x=2, y=10
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Sensor at x=2, y=0: closest beacon is at x=2, y=10
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Sensor at x=0, y=11: closest beacon is at x=2, y=10
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Sensor at x=20, y=14: closest beacon is at x=25, y=17
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Sensor at x=17, y=20: closest beacon is at x=21, y=22
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Sensor at x=16, y=7: closest beacon is at x=15, y=3
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Sensor at x=14, y=3: closest beacon is at x=15, y=3
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Sensor at x=20, y=1: closest beacon is at x=15, y=3
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So, consider the sensor at 2,18; the closest beacon to it is at -2,15. For the sensor at 9,16, the closest
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beacon to it is at 10,16.
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Drawing sensors as S and beacons as B, the above arrangement of sensors and beacons looks like this:
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1 1 2 2
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0 5 0 5 0 5
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0 ....S.......................
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1 ......................S.....
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2 ...............S............
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3 ................SB..........
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4 ............................
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5 ............................
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6 ............................
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7 ..........S.......S.........
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8 ............................
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9 ............................
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10 ....B.......................
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11 ..S.........................
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12 ............................
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13 ............................
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14 ..............S.......S.....
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15 B...........................
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16 ...........SB...............
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17 ................S..........B
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18 ....S.......................
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19 ............................
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20 ............S......S........
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21 ............................
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22 .......................B....
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This isn't necessarily a comprehensive map of all beacons in the area, though. Because each sensor only
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identifies its closest beacon, if a sensor detects a beacon, you know there are no other beacons that close or
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closer to that sensor. There could still be beacons that just happen to not be the closest beacon to any
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sensor. Consider the sensor at 8,7:
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1 1 2 2
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0 5 0 5 0 5
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-2 ..........#.................
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-1 .........###................
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0 ....S...#####...............
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1 .......#######........S.....
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2 ......#########S............
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3 .....###########SB..........
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4 ....#############...........
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5 ...###############..........
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6 ..#################.........
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7 .#########S#######S#........
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8 ..#################.........
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9 ...###############..........
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10 ....B############...........
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11 ..S..###########............
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12 ......#########.............
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13 .......#######..............
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14 ........#####.S.......S.....
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15 B........###................
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16 ..........#SB...............
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17 ................S..........B
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18 ....S.......................
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19 ............................
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20 ............S......S........
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21 ............................
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22 .......................B....
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This sensor's closest beacon is at 2,10, and so you know there are no beacons that close or closer (in any
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positions marked #).
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|
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None of the detected beacons seem to be producing the distress signal, so you'll need to work out where the
|
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distress beacon is by working out where it isn't. For now, keep things simple by counting the positions where a
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beacon cannot possibly be along just a single row.
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So, suppose you have an arrangement of beacons and sensors like in the example above and, just in the row where
|
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y=10, you'd like to count the number of positions a beacon cannot possibly exist. The coverage from all sensors
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near that row looks like this:
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1 1 2 2
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0 5 0 5 0 5
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9 ...#########################...
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10 ..####B######################..
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11 .###S#############.###########.
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In this example, in the row where y=10, there are 26 positions where a beacon cannot be present.
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|
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Consult the report from the sensors you just deployed. In the row where y=2000000, how many positions cannot
|
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contain a beacon?
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|
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To begin, get your puzzle input.
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|
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Answer: _____________________ [ [Submit] ]
|
||||
|
||||
You can also [Shareon Twitter Mastodon] this puzzle.
|
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|
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References
|
||||
|
||||
Visible links
|
||||
. https://adventofcode.com/
|
||||
. https://adventofcode.com/2022/about
|
||||
. https://adventofcode.com/2022/events
|
||||
. https://teespring.com/stores/advent-of-code
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||||
. https://adventofcode.com/2022/settings
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. https://adventofcode.com/2022/auth/logout
|
||||
. Advent of Code Supporter
|
||||
https://adventofcode.com/2022/support
|
||||
. https://adventofcode.com/2022
|
||||
. https://adventofcode.com/2022
|
||||
. https://adventofcode.com/2022/support
|
||||
. https://adventofcode.com/2022/sponsors
|
||||
. https://adventofcode.com/2022/leaderboard
|
||||
. https://adventofcode.com/2022/stats
|
||||
. https://adventofcode.com/2022/sponsors
|
||||
. https://www.bjss.com/
|
||||
. https://en.wikipedia.org/wiki/Taxicab_geometry
|
||||
. https://adventofcode.com/2022/day/15/input
|
||||
. https://twitter.com/intent/tweet?text=%22Beacon+Exclusion+Zone%22+%2D+Day+15+%2D+Advent+of+Code+2022&url=https%3A%2F%2Fadventofcode%2Ecom%2F2022%2Fday%2F15&related=ericwastl&hashtags=AdventOfCode
|
||||
. javascript:void(0);
|
14
2022/day15/testinput
Normal file
14
2022/day15/testinput
Normal file
@ -0,0 +1,14 @@
|
||||
Sensor at x=2, y=18: closest beacon is at x=-2, y=15
|
||||
Sensor at x=9, y=16: closest beacon is at x=10, y=16
|
||||
Sensor at x=13, y=2: closest beacon is at x=15, y=3
|
||||
Sensor at x=12, y=14: closest beacon is at x=10, y=16
|
||||
Sensor at x=10, y=20: closest beacon is at x=10, y=16
|
||||
Sensor at x=14, y=17: closest beacon is at x=10, y=16
|
||||
Sensor at x=8, y=7: closest beacon is at x=2, y=10
|
||||
Sensor at x=2, y=0: closest beacon is at x=2, y=10
|
||||
Sensor at x=0, y=11: closest beacon is at x=2, y=10
|
||||
Sensor at x=20, y=14: closest beacon is at x=25, y=17
|
||||
Sensor at x=17, y=20: closest beacon is at x=21, y=22
|
||||
Sensor at x=16, y=7: closest beacon is at x=15, y=3
|
||||
Sensor at x=14, y=3: closest beacon is at x=15, y=3
|
||||
Sensor at x=20, y=1: closest beacon is at x=15, y=3
|
@ -118,7 +118,7 @@ func (c Coordinate) String() string {
|
||||
}
|
||||
|
||||
func (c Coordinate) Distance(t Coordinate) int {
|
||||
return AbsInt(c.X-t.X) + AbsInt(c.Y-t.Y)
|
||||
return ManhattanDistance(c.X, c.Y, t.X, t.Y)
|
||||
}
|
||||
|
||||
func (c Coordinate) Equals(c2 Coordinate) bool {
|
||||
|
@ -416,3 +416,7 @@ func Sum(l, h int) int {
|
||||
}
|
||||
return ret
|
||||
}
|
||||
|
||||
func ManhattanDistance(x1, y1, x2, y2 int) int {
|
||||
return AbsInt(x1-x2) + AbsInt(y1-y2)
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user