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@@ -0,0 +1,48 @@
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+package main
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+
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+import (
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+ "fmt"
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+ "io/ioutil"
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+ "log"
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+ "os"
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+ "sort"
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+ "strconv"
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+ "strings"
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+)
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+
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+func readInput(file string) (map[int]int, []int) {
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+ content, err := ioutil.ReadFile(file)
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+ if err != nil {
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+ log.Fatal(err)
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+ }
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+
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+ numberStrings := strings.Split(string(content), ",")
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+ crabs := make(map[int]int)
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+ var orderedCrabs []int
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+ for _, numberString := range numberStrings {
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+ if numberString == "" {
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+ continue
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+ }
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+
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+ if number, err := strconv.Atoi(numberString); err == nil {
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+ if _, ok := crabs[number]; !ok {
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+ orderedCrabs = append(orderedCrabs, number)
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+ }
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+ crabs[number]++
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+ } else {
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+ log.Fatal(err)
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+ }
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+ }
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+
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+ sort.Ints(orderedCrabs)
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+ return crabs, orderedCrabs
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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("Please provide a file name as argument")
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+ }
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+
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+ crabs, orderedCrabs := readInput(os.Args[1])
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+ fmt.Println(crabs, orderedCrabs)
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+}
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