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@@ -0,0 +1,58 @@
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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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+func readInput(file *os.File) ([][]int, []int) {
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+ scanner := bufio.NewScanner(file)
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+ var ranges [][]int
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+ var ingredients []int
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+ readingRanges := true
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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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+ readingRanges = false
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+ continue
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+ }
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+
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+ if readingRanges {
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+ var start, end int
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+ n, err := fmt.Sscanf(line, "%d-%d", &start, &end)
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+ if n != 2 || err != nil {
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+ log.Fatalf("Bad input: %s", line)
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+ }
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+
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+ ranges = append(ranges, []int{start, end})
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+ } else {
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+ var ingredient int
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+ n, err := fmt.Sscanf(line, "%d", &ingredient)
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+ if n != 1 || err != nil {
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+ log.Fatalf("Bad input: %s", line)
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+ }
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+
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+ ingredients = append(ingredients, ingredient)
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+ }
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+ }
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+
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+ return ranges, ingredients
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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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+ ranges, ingredients := readInput(file)
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+ fmt.Println(ranges, ingredients)
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+}
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