diff --git a/12/input.txt b/12/input.txt new file mode 100644 index 0000000..4823e76 --- /dev/null +++ b/12/input.txt @@ -0,0 +1,140 @@ +TTTTTTTTTTTTTTDDDDDDDDDDDDAAAKKKKKKKKKKKKKKKKKKKKKKKRRRRRRRRRRRRRXXXXXXXXXXZFFFFFFFFFFOFVVVVVVQQQQQUQQQQQQQQQQQQQQQQQCCGGNNNNHHHHHHHHHHHHHHH +TTTTTTTTTTTTTTDDDDDDDDDDDDAAAAAAKKKKKFKKKKKKKKKKKKKKRRRRRRRRRRRXXXXXXXXXXXXZFFFFFFFFFFFFFFFVMMQQQQQQQQQQQQQQQQQQQQQQQGGGGNNNNHHHHHHHHHHHHHHH +TTTTTTTTTTTTDDDDDDDDDDDUAAAAAAAAAKKFFFKKKKKKKKKKKKKKRRRRRRRRRRXXXXXXXXMXMMFFFFFFFFFFFFFFFMMMMMNQQQQQQQQQQQQQQQQQQQQQZZGGNNNNHHHHHHHHHHHHHHHH +TTTTTTTBTTTTDDDDDDDDDDUUUAAAAAAAKKKKFFKKKKKKKKKVLLLLLRRRRRRRRRXXXXXXXMMMMMFMMMMFFFFFFFFFXMMHMMNQQQQQQQIQQQQQQQQQQQQQQQGGNNNNVVVHHHHHHHHHHHHH +TTTTBTBBTTTTDDDDDDDDDDUUUAAAAAAAKKKFFKKKKKKKKKNLLLLLLRRRRRRRRRXXXXXXXMMMMMMMMMFFFFFFFFHXXXMHHNNQQQQQQQIIIQQQQQQQQQQQQQGGVVVVVOHHHHHRRRHRHHHD +TBBBBBBBTTTTDDDDDDDDUDUUUAAAFAAAKKKFFKFFFKKKKKKWWLLLLRRRRRROOOOOXBMMMMMMMMMMEFFMFFFFHHHHXMMHHHHQQQQQQQQIIQQQQQQQQQQQGGGGGVVVVVVZHHXRRRRRHDHD 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+TTTTTTTTLLLLLLLLLLLLLLLLLLLLGSSSGTGSSYYYYYYYYYRRRRRRRRRRRRRPRRIIIIIIIIIIIAAAAAAAAAAEHEEQQQQQQQQQQQQQQFFFFIIIIIIIIYYGGGVVVVVVVYYYWYYYQQQQQQQQ \ No newline at end of file diff --git a/12/main.go b/12/main.go new file mode 100644 index 0000000..843d11d --- /dev/null +++ b/12/main.go @@ -0,0 +1,247 @@ +package main + +import ( + "bufio" + "fmt" + "os" + "time" +) + +const FILE_PATH = "./input.txt" + +//const FILE_PATH = "./sample.txt" + +func LoadInput(filename string) ([]string, error) { + file, err := os.Open(filename) + if err != nil { + return nil, err + } + defer file.Close() + + var lines []string + scanner := bufio.NewScanner(file) + for scanner.Scan() { + lines = append(lines, scanner.Text()) + } + + if err := scanner.Err(); err != nil { + return nil, err + } + + return lines, nil +} + +type structuredInput = [][]byte + +func TransformInput(lines []string) structuredInput { + var result = make([][]byte, 0) + + for _, line := range lines { + result = append(result, []byte(line)) + } + + return result +} + +func calcCircumAndSize(input structuredInput, visited [][]bool, char byte, x int, y int) (int, int) { + visited[y][x] = true + var size = 1 + var circum = 0 + var tempSize = 0 + var tempCircum = 0 + if x-1 < 0 || input[y][x-1] != char { + circum += 1 + } else if !visited[y][x-1] { + tempCircum, tempSize = calcCircumAndSize(input, visited, char, x-1, y) + size += tempSize + circum += tempCircum + } + + if x+1 >= len(input[y]) || input[y][x+1] != char { + circum += 1 + } else if !visited[y][x+1] { + tempCircum, tempSize = calcCircumAndSize(input, visited, char, x+1, y) + size += tempSize + circum += tempCircum + } + + if y-1 < 0 || input[y-1][x] != char { + circum += 1 + } else if !visited[y-1][x] { + tempCircum, tempSize = calcCircumAndSize(input, visited, char, x, y-1) + size += tempSize + circum += tempCircum + } + + if y+1 >= len(input) || input[y+1][x] != char { + circum += 1 + } else if !visited[y+1][x] { + tempCircum, tempSize = calcCircumAndSize(input, visited, char, x, y+1) + size += tempSize + circum += tempCircum + } + + return circum, size +} + +type Fence struct { + verL bool + horU bool + verR bool + horD bool +} + +func calcFenceAndSize(input structuredInput, visited [][]bool, char byte, x int, y int, fence [][]Fence) int { + visited[y][x] = true + var size = 1 + if x-1 < 0 || input[y][x-1] != char { + fence[y+1][x-1+1].verL = true + } else if !visited[y][x-1] { + size += calcFenceAndSize(input, visited, char, x-1, y, fence) + } + + if x+1 >= len(input[y]) || input[y][x+1] != char { + fence[y+1][x+1+1].verR = true + } else if !visited[y][x+1] { + size += calcFenceAndSize(input, visited, char, x+1, y, fence) + } + + if y-1 < 0 || input[y-1][x] != char { + fence[y-1+1][x+1].horU = true + } else if !visited[y-1][x] { + size += calcFenceAndSize(input, visited, char, x, y-1, fence) + } + + if y+1 >= len(input) || input[y+1][x] != char { + fence[y+1+1][x+1].horD = true + } else if !visited[y+1][x] { + size += calcFenceAndSize(input, visited, char, x, y+1, fence) + } + + return size +} + +func Part1(input structuredInput) int { + var result = 0 + + var visited [][]bool = make([][]bool, len(input)) + var size int = 0 + var circum int = 0 + for i := 0; i < len(input); i++ { + visited[i] = make([]bool, len(input[i])) + } + + for y := 0; y < len(input); y++ { + for x := 0; x < len(input[y]); x++ { + if !visited[y][x] { + circum, size = calcCircumAndSize(input, visited, input[y][x], x, y) + result += circum * size + } + } + } + + return result +} + +func Part2(input structuredInput) int { + var result = 0 + + var visited [][]bool = make([][]bool, len(input)) + var size int = 0 + var fence [][]Fence + var sides int + var insideSide1 bool + var insideSide2 bool + for i := 0; i < len(input); i++ { + visited[i] = make([]bool, len(input[i])) + + } + + for y := 0; y < len(input); y++ { + for x := 0; x < len(input[y]); x++ { + if !visited[y][x] { + fence = make([][]Fence, len(input)+2) + for i := 0; i < len(input)+2; i++ { + fence[i] = make([]Fence, len(input[0])+2) + } + size = calcFenceAndSize(input, visited, input[y][x], x, y, fence) + sides = 0 + for m := 0; m < len(fence); m++ { + insideSide1 = false + insideSide2 = false + for n := 0; n < len(fence[m]); n++ { + if insideSide1 && !fence[m][n].horU { + insideSide1 = false + sides += 1 + } else if !insideSide1 && fence[m][n].horU { + insideSide1 = true + } + if insideSide2 && !fence[m][n].horD { + insideSide2 = false + sides += 1 + } else if !insideSide2 && fence[m][n].horD { + insideSide2 = true + } + } + if insideSide1 { + sides += 1 + } + if insideSide2 { + sides += 1 + } + } + + for n := 0; n < len(fence[0]); n++ { + insideSide1 = false + insideSide2 = false + for m := 0; m < len(fence); m++ { + if insideSide1 && !fence[m][n].verL { + insideSide1 = false + sides += 1 + } else if !insideSide1 && fence[m][n].verL { + insideSide1 = true + } + if insideSide2 && !fence[m][n].verR { + insideSide2 = false + sides += 1 + } else if !insideSide2 && fence[m][n].verR { + insideSide2 = true + } + } + if insideSide1 { + sides += 1 + } + if insideSide2 { + sides += 1 + } + } + result += size * sides + } + } + } + + return result +} + +func main() { + var start time.Time + var elapsed time.Duration = 0 + input, err := LoadInput(FILE_PATH) + if err != nil { + fmt.Println("Error loading input:", err) + return + } + + structuredInput := TransformInput(input) + fmt.Println("Structured Input:", structuredInput) + + start = time.Now() + fmt.Println("Solution Part 1: ", Part1(structuredInput)) + elapsed = time.Since(start) + fmt.Printf("Part 1 took %s\n", elapsed) + + start = time.Now() + fmt.Println("Solution Part 2: ", Part2(structuredInput)) + elapsed = time.Since(start) + fmt.Printf("Part 2 took %s\n", elapsed) +} diff --git a/12/sample.txt b/12/sample.txt new file mode 100644 index 0000000..c7541ac --- /dev/null +++ b/12/sample.txt @@ -0,0 +1,6 @@ +AAAAAA +AAABBA +AAABBA +ABBAAA +ABBAAA +AAAAAA \ No newline at end of file