73 lines
1.2 KiB
Go
73 lines
1.2 KiB
Go
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package main
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import (
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"bufio"
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"fmt"
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"math"
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"os"
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)
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func main() {
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content := returnContent("../input")
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//content := returnContent("testInput")
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gamma, epsilon := findGammaAndEpsilon(content)
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fmt.Println(binaryToInteger(gamma) * binaryToInteger(epsilon))
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}
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func findGammaAndEpsilon(content *[]string) (gamma string, epsilon string) {
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for i := 0; i < len((*content)[1]); i++ {
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count := 0
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//Loop through list checking index[i] for each string
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for j := 0; j < len(*content); j++ {
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if ((*content)[j])[i] == '1' {
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count++
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}
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}
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if count >= len(*content)/2 {
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gamma += "1"
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epsilon += "0"
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} else {
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gamma += "0"
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epsilon += "1"
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}
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}
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return
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}
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func binaryToInteger(input string) (value int) {
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n := 0
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for i := len(input) - 1; i >= 0; i-- {
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if input[i] == '1' {
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value += (int(math.Pow(float64(2), float64(n))))
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}
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n++
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}
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return
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}
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func returnContent(path string) *[]string {
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//read file and return it as an array of integers
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file, err := os.Open(path)
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var content []string
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if err != nil {
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fmt.Println("Unlucky, the file didn't open")
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return &content
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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content = append(content, scanner.Text())
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}
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return &content
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}
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