|
|
@@ -5,6 +5,7 @@ import (
|
|
|
"io/ioutil"
|
|
|
"log"
|
|
|
"os"
|
|
|
+ "strconv"
|
|
|
"strings"
|
|
|
)
|
|
|
|
|
|
@@ -18,11 +19,47 @@ func readInput(file string) []string {
|
|
|
return lines
|
|
|
}
|
|
|
|
|
|
+func part1(lines []string) int64 {
|
|
|
+ var gamma []string
|
|
|
+ var epsilon []string
|
|
|
+
|
|
|
+ for i := 0; i < len(lines[0]); i++ {
|
|
|
+ counts := []int{0, 0}
|
|
|
+ for _, line := range lines {
|
|
|
+ if line[i] == '0' {
|
|
|
+ counts[0]++
|
|
|
+ } else {
|
|
|
+ counts[1]++
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if counts[0] > counts[1] {
|
|
|
+ gamma = append(gamma, "0")
|
|
|
+ epsilon = append(epsilon, "1")
|
|
|
+ } else {
|
|
|
+ gamma = append(gamma, "1")
|
|
|
+ epsilon = append(epsilon, "0")
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ gammaNumber, err := strconv.ParseInt(strings.Join(gamma, ""), 2, 64)
|
|
|
+ if err != nil {
|
|
|
+ log.Fatal(err)
|
|
|
+ }
|
|
|
+
|
|
|
+ epsilonNumber, err := strconv.ParseInt(strings.Join(epsilon, ""), 2, 64)
|
|
|
+ if err != nil {
|
|
|
+ log.Fatal(err)
|
|
|
+ }
|
|
|
+
|
|
|
+ return gammaNumber * epsilonNumber
|
|
|
+}
|
|
|
+
|
|
|
func main() {
|
|
|
if len(os.Args) < 2 {
|
|
|
log.Fatal("You need to provide path to input file!")
|
|
|
}
|
|
|
|
|
|
lines := readInput(os.Args[1])
|
|
|
- fmt.Println(lines)
|
|
|
+ fmt.Println(part1(lines))
|
|
|
}
|
