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@@ -0,0 +1,46 @@
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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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+ "strings"
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+)
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+
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+func readInput(file *os.File) map[string][]string {
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+ scanner := bufio.NewScanner(file)
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+ computers := make(map[string][]string)
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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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+ parts := strings.Split(line, "-")
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+ if len(parts) != 2 {
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+ log.Fatalf("Bad input: %s", line)
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+ }
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+
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+ computers[parts[0]] = append(computers[parts[0]], parts[1])
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+ computers[parts[1]] = append(computers[parts[1]], parts[0])
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+ }
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+
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+ return computers
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+}
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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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+ computers := readInput(file)
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+ fmt.Println(computers)
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+}
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