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- package main
- import (
- "fmt"
- "io/ioutil"
- "log"
- "os"
- "strconv"
- "strings"
- )
- func readInput(file string) [][]int {
- content, err := ioutil.ReadFile(file)
- if err != nil {
- log.Fatal(err)
- }
- lines := strings.Split(string(content), "\n")
- var input [][]int
- for _, line := range lines {
- if line == "" {
- continue
- }
- var numbers []int
- for _, letter := range line {
- if number, err := strconv.Atoi(string(letter)); err == nil {
- numbers = append(numbers, number)
- } else {
- log.Fatal(err)
- }
- }
- input = append(input, numbers)
- }
- return input
- }
- func main() {
- if len(os.Args) < 2 {
- log.Fatal("Please provide a file name as argument")
- }
- input := readInput(os.Args[1])
- fmt.Println(input)
- }
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