Add solution for 03/1
Created by voroskoi on December 3, 2021
A5ACPORMF3KLILKA6VE6BXXJPCXGAIDSMCTJWWXSKK6XJZBOIMGAC In channels
main
Change contents
File addition: 03
[1.0]File addition: main.go
[0.14]package mainimport ("bufio""fmt""log""os""strconv""strings")func main() {if err := myMain(); err != nil {log.Println(err)}}func myMain() error {// parse input.txtdata, err := parseInput()if err != nil {return err}first, err := solveFirst(data)if err != nil {return err}log.Println("Part1:", first)return nil}func solveFirst(data []string) (int64, error) {g, e, err := getGE(data)if err != nil {return 0, err}gint, err := strconv.ParseInt(g, 2, 64)if err != nil {return 0, err}eint, err := strconv.ParseInt(e, 2, 64)if err != nil {return 0, err}return gint * eint, nil}func getGE(data []string) (string, string, error) {gamma := strings.Builder{}epsilon := strings.Builder{}var zero, one intgammaLen := len(data[0])for j := 0; j < gammaLen; j++ {for _, line := range data {switch line[j] {case '0':zero++case '1':one++default:return "", "", fmt.Errorf("invalid binary")}}if one > zero {gamma.WriteByte('1')epsilon.WriteByte('0')} else {gamma.WriteByte('0')epsilon.WriteByte('1')}zero, one = 0, 0}return gamma.String(), epsilon.String(), nil}func parseInput() ([]string, error) {fd, err := os.Open("input.txt")if err != nil {return nil, err}defer fd.Close()buf := bufio.NewScanner(fd)var ret []stringfor buf.Scan() {ret = append(ret, buf.Text())}return ret, nil}File addition: input.txt
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addition: go.mod
[0.14]module maingo 1.17