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@@ -0,0 +1,54 @@
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+package main
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+
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+import (
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+ "bufio"
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+ "fmt"
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+ "log"
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+ "os"
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+)
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+
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+type Object struct {
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+ xmin, ymin, zmin int
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+ xmax, ymax, zmax int
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+}
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+
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+func readInput(file *os.File) (map[int][]Object, map[int][]Object, []Object) {
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+ scanner := bufio.NewScanner(file)
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+ startsAt := make(map[int][]Object)
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+ endsAt := make(map[int][]Object)
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+ var objects []Object
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+
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+ for scanner.Scan() {
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+ line := scanner.Text()
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+ if line == "" {
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+ break
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+ }
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+
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+ var object Object
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+ n, err := fmt.Sscanf(line, "%d,%d,%d~%d,%d,%d", &object.xmin, &object.ymin, &object.zmin, &object.xmax, &object.ymax, &object.zmax)
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+ if n != 6 || err != nil {
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+ log.Fatalf("Bad input: %s\n%s", line, err)
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+ }
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+
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+ startsAt[object.zmin] = append(startsAt[object.zmin], object)
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+ endsAt[object.zmax] = append(endsAt[object.zmax], object)
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+ objects = append(objects, object)
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+ }
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+
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+ return startsAt, endsAt, objects
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+}
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+func main() {
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+ if len(os.Args) < 2 {
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+ log.Fatal("You need to specify a file!")
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+ }
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+
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+ filePath := os.Args[1]
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+ file, err := os.Open(filePath)
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+ if err != nil {
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+ log.Fatalf("Failed to open %s!\n", filePath)
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+
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+ }
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+
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+ startsAt, endsAt, objects := readInput(file)
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+ fmt.Println(startsAt, endsAt, objects)
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+}
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