From be110c4dea2ff014b541c8b78c14a42933aefffe Mon Sep 17 00:00:00 2001 From: xuu Date: Wed, 20 Dec 2023 11:27:20 -0700 Subject: [PATCH] chore: save day18 --- day18/example.txt | 14 + day18/input.txt | 766 +++++++++++++++++++++++++++++++++++++++++++++ day18/main.go | 215 +++++++++++++ day18/main_test.go | 42 +++ 4 files changed, 1037 insertions(+) create mode 100644 day18/example.txt create mode 100644 day18/input.txt create mode 100644 day18/main.go create mode 100644 day18/main_test.go diff --git a/day18/example.txt b/day18/example.txt new file mode 100644 index 0000000..0ad754b --- /dev/null +++ b/day18/example.txt @@ -0,0 +1,14 @@ +R 6 (#70c710) +D 5 (#0dc571) +L 2 (#5713f0) +D 2 (#d2c081) +R 2 (#59c680) +D 2 (#411b91) +L 5 (#8ceee2) +U 2 (#caa173) +L 1 (#1b58a2) +U 2 (#caa171) +R 2 (#7807d2) +U 3 (#a77fa3) +L 2 (#015232) +U 2 (#7a21e3) \ No newline at end of file diff --git a/day18/input.txt b/day18/input.txt new file mode 100644 index 0000000..79212d7 --- /dev/null +++ b/day18/input.txt @@ -0,0 +1,766 @@ +R 4 (#0a7a60) +U 8 (#4453b3) +R 6 (#8e4f70) +U 2 (#4453b1) +R 4 (#0feb00) +U 4 (#355591) +R 8 (#2a09c0) +U 4 (#544c71) +R 4 (#472930) +U 2 (#199e33) +R 3 (#3d8df0) +U 5 (#199e31) +R 7 (#45de50) +U 4 (#57a941) +L 7 (#671c70) +U 5 (#5e5e81) +R 4 (#2e9b60) +U 8 (#490881) +L 7 (#1846f0) +U 3 (#304101) +L 4 (#1846f2) +D 2 (#58f3f1) +L 9 (#2e9b62) +D 2 (#56dcd1) +L 2 (#671c72) +D 9 (#275fd1) +L 4 (#76b7b2) +U 9 (#5b9641) +L 4 (#1d3212) +U 10 (#3d1841) +L 3 (#5ad5e2) +D 6 (#010211) +L 5 (#13ec52) +D 8 (#166471) +L 3 (#53ebc0) +D 5 (#0fdba1) +L 4 (#54e450) +D 9 (#440a21) +L 3 (#49b242) +D 5 (#2f0171) +L 6 (#447332) +D 4 (#182561) +L 8 (#1aaaa2) +D 6 (#0996a1) +L 4 (#1c1212) +D 6 (#5780d1) +L 7 (#0fc1d2) +D 7 (#36cb41) +L 3 (#505552) +D 7 (#8d8b81) +R 4 (#2bf742) +D 7 (#152791) +R 5 (#760492) +D 3 (#11a991) +R 3 (#5debc0) +D 10 (#59f211) +L 4 (#66d342) +D 8 (#1fc6b1) +R 4 (#66d340) +D 6 (#72dff1) +L 2 (#3f1b10) +D 4 (#2fca13) +L 10 (#2d0162) +D 5 (#8b5e53) 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(#3f73f0) +U 3 (#46f5a3) +L 4 (#935370) +U 4 (#46f5a1) +L 5 (#3ca140) +U 6 (#07b1e3) +L 5 (#61ecd0) +U 5 (#654743) +L 5 (#3cec42) +U 6 (#30bb83) +R 3 (#920782) +U 6 (#1f9323) +R 8 (#3d8aa2) +U 8 (#7492c3) +R 3 (#301cd2) +U 3 (#32e2f1) +R 4 (#6936f2) +U 6 (#32e2f3) +R 6 (#5112c2) +U 7 (#535b53) +L 10 (#61f4d0) +U 3 (#915863) +L 2 (#51d540) +U 5 (#32dee1) +L 10 (#4ec320) +U 5 (#406bc1) +L 2 (#1b3890) +U 3 (#681181) +L 6 (#35ed60) +D 9 (#153fd3) +L 5 (#323e30) +U 5 (#381ad3) +L 3 (#69a550) +U 3 (#310f63) +L 4 (#2cbb80) +U 5 (#3448a3) +R 6 (#206282) +U 5 (#202ab1) +L 6 (#83af82) +U 4 (#202ab3) +L 4 (#248d02) +D 9 (#28a983) +L 4 (#32cf10) +D 7 (#249d73) +R 4 (#2f5c70) +D 6 (#021c93) +L 7 (#957782) +D 6 (#550e53) +R 5 (#957780) +D 6 (#50bb13) +R 9 (#49b7f2) +U 6 (#096e93) +R 4 (#769452) +D 3 (#6dc543) +R 5 (#2ad352) +D 7 (#167963) +L 10 (#673682) +D 5 (#152883) +L 10 (#13f332) +D 3 (#996721) +L 4 (#4be2a2) +D 4 (#9c2443) +L 4 (#2b83b0) +D 3 (#5d63b3) +L 9 (#9cfd40) +D 7 (#49e793) +L 7 (#0b5422) +D 8 (#5c51b3) +L 2 (#6db152) +D 4 (#215b53) +L 3 (#38dc12) +D 8 (#7dad01) +L 6 (#559e22) +D 3 (#929d23) +L 2 (#0f7560) +D 6 (#448d13) +L 7 (#73a972) +D 2 (#2221c3) +L 3 (#73a970) +D 5 (#53b553) +R 10 (#513590) +D 3 (#293c83) +L 10 (#58e2e0) +D 4 (#54dd21) +L 5 (#1bcdf2) +D 5 (#4b0b71) +L 5 (#1bcdf0) +U 6 (#43b811) +L 5 (#4df1d0) +U 6 (#36d6a3) +R 5 (#3bfb20) +U 5 (#75de61) +L 5 (#1e0ec2) +U 4 (#30b571) +L 7 (#2dfd20) +D 5 (#49ad61) +L 2 (#2dfd22) +D 11 (#715d41) +L 3 (#1e0ec0) +U 4 (#0f2091) +L 4 (#9d29c0) +U 9 (#475a73) +L 2 (#108610) +U 3 (#1e5423) +L 8 (#394192) +U 3 (#0274b3) diff --git a/day18/main.go b/day18/main.go new file mode 100644 index 0000000..063e3c5 --- /dev/null +++ b/day18/main.go @@ -0,0 +1,215 @@ +package main + +import ( + "bufio" + _ "embed" + "encoding/hex" + "fmt" + "strings" + + aoc "go.sour.is/advent-of-code" +) + +// var log = aoc.Log + +func main() { aoc.MustResult(aoc.Runner(run)) } + +type result struct { + valuePT1 int + valuePT2 int +} + +func (r result) String() string { return fmt.Sprintf("%#v", r) } + +func run(scan *bufio.Scanner) (*result, error) { + + var vecs []vec + + for scan.Scan() { + text := scan.Text() + + if len(text) == 0 { + continue + } + + var s string + v := vec{} + s, text, _ = strings.Cut(text, " ") + v.Direction = direction(s) + s, text, _ = strings.Cut(text, " ") + v.Steps = aoc.Atoi(s) + _, text, _ = strings.Cut(text, "#") + s, _, _ = strings.Cut(text, ")") + b, _ := hex.DecodeString(s) + copy(v.Color[:], b) + vecs = append(vecs, v) + } + + var points []point + + var x, y int + var minX, minY int + for i, v := range vecs { + fmt.Println("pt ", i, v) + + for i := 0; i < v.Steps; i++ { + switch v.Direction { + case "U": + y++ + case "D": + y-- + case "R": + x++ + case "L": + x-- + } + + minX = min(minX, x) + minY = min(minY, y) + points = append(points, point{d: v.Direction, x: x, y: y, color: v.Color}) + } + } + + adjX := aoc.ABS(min(0, minX)) + adjY := aoc.ABS(min(0, minY)) + fmt.Println("minX", minX, "minY", minY) + fmt.Println("adjX", adjX, "adjY", adjY) + + trace := make(map[int]map[int]point) + + minX, minY = 0, 0 + maxX, maxY := 0, 0 + + for i, p := range points { + // fmt.Println("raw", i, p) + p.x += adjX + p.y += adjY + + maxX = max(maxX, p.x) + maxY = max(maxY, p.y) + + points[i] = p + + if row, ok := trace[p.y]; true { + if !ok { + row = make(map[int]point) + } + row[p.x] = p + trace[p.y] = row + } + } + + area := 0 + + for y := 0; y <= maxY; y++ { + row, ok := trace[y] + if !ok { + continue + } + + var last direction + p, inLoop := row[0] + last = p.d + + for x := 0; x <= maxX; x++ { + if p, ok := row[x]; ok { + switch last+p.d { + case " U"," L", "UR": + inLoop = true + case "LD", " D", "RD": + inLoop = !inLoop + } + if last != p.d { + last = p.d + } + fmt.Print(p.d) + if inLoop { + area++ + } + continue + } + last = direction(" ") + + if inLoop { + area++ + fmt.Print(".") + } else { + fmt.Print(" ") + } + + } + fmt.Println("") + } + + // for y := 0; y < len(trace); y++ { + // rng := trace[y] + // sort.Ints(rng) + // for _, r := range ranges(rng) { + // area += r[1] - r[0] + 1 + // } + // } + + return &result{valuePT1: area}, nil +} + +type direction string + +const ( + U direction = "U" + D direction = "D" + L direction = "L" + R direction = "R" +) + +type vec struct { + Direction direction + Steps int + Color [3]byte +} + +type point struct { + w direction + d direction + x, y int + color [3]byte +} + +func ranges(rng []int) [][]int { + // inLoop := true + var mn int = rng[0] + var last int = rng[0] + var result [][]int + result = append(result, []int{mn, mn}) + + for _, i := range rng[1:] { + if i-last == 1 { + result[len(result)-1][1] = i + last = i + continue + } + + last = i + mn = i + result = append(result, []int{mn, last}) + } + + if len(result) == 1 { + return result + } + + if len(result) == 2 { + return [][]int{{result[0][0], result[1][1]}} + } + + if len(result)%2 == 0 { + var result2 [][]int + for i := 0; i < len(result); i += 2 { + result2 = append(result2, []int{result[i][0], result[i+1][1]}) + } + + return result2 + } + + fmt.Println("odd ranges", result) + return nil +} diff --git a/day18/main_test.go b/day18/main_test.go new file mode 100644 index 0000000..e709ab5 --- /dev/null +++ b/day18/main_test.go @@ -0,0 +1,42 @@ +package main + +import ( + "bufio" + "bytes" + "testing" + + _ "embed" + + "github.com/matryer/is" +) + +//go:embed example.txt +var example []byte + +//go:embed input.txt +var input []byte + +func TestExample(t *testing.T) { + is := is.New(t) + scan := bufio.NewScanner(bytes.NewReader(example)) + + result, err := run(scan) + is.NoErr(err) + + t.Log(result) + is.Equal(result.valuePT1, 62) + is.Equal(result.valuePT2, 0) +} + +func TestSolution(t *testing.T) { + is := is.New(t) + scan := bufio.NewScanner(bytes.NewReader(input)) + + result, err := run(scan) + is.NoErr(err) + + t.Log(result) + is.True(result.valuePT1 < 68834) // first attempt too high. + is.Equal(result.valuePT1, 0) + is.Equal(result.valuePT2, 0) +}