8000 feat: solution for wait for it: part One · christianotieno/adventofcode@416253f · GitHub
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christianotienochristianotieno
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feat: solution for wait for it: part One
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4 files changed

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‎day6/waitForIt.go

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package day6
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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func WaitForIt(filePath string) int {
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file, err := os.Open(filePath)
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if err != nil {
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_ = fmt.Errorf("error opening file: %v", err)
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}
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defer func(file *os.File) {
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err := file.Close()
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if err != nil {
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return
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}
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}(file)
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scanner := bufio.NewScanner(file)
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var times, dist []int
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for scanner.Scan() {
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line := scanner.Text()
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fields := strings.Fields(line)
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if len(fields) > 1 {
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values := convertToIntSlice(fields[1:])
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switch strings.ToLower(fields[0]) {
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case "time:":
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times = values
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case "distance:":
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dist = values
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}
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}
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}
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if err := scanner.Err(); err != nil {
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_ = fmt.Errorf("error reading file: %v", err)
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}
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ans := 1
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for i := 0; i < len(times); i++ {
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ans *= countValidDistances(times[i], dist[i])
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}
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return ans
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}
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func convertToIntSlice(strSlice []string) []int {
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intSlice := make([]int, len(strSlice))
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for i, v := range strSlice {
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num, err := strconv.Atoi(v)
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if err != nil {
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_ = fmt.Errorf("error converting string to int: %v", err)
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}
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intSlice[i] = num
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}
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return intSlice
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}
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func convertToInt(values []int) int {
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result, multiplier := 0, 1
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for i := len(values) - 1; i >= 0; i-- {
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result += values[i] * multiplier
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multiplier *= 10
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}
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return result
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}
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func countValidDistances(time, distance int) int {
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validDistances := 0
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for x := 0; x <= time; x++ {
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dx := x * (time - x)
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if dx >= distance {
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validDistances++
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}
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}
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return validDistances
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}

‎day6/waitForIt.txt

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Time: 49 87 78 95
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Distance: 356 1378 1502 1882

‎day6/waitForItTestFile.txt

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Time: 7 15 30
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Distance: 9 40 200

‎day6/waitForIt_test.go

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package day6
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import "testing"
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func TestWaitForIt(t *testing.T) {
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got := WaitForIt("waitForItTestFile.txt")
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expected := 352
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if expected != got {
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t.Errorf("Expected: %d, got: %d", expected, got)
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}
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}

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